United States Patent 10,010,083: Bt aizawai + Bt kurstaki Ratio Claims and the U.S. Landscape

What does US 10,010,083 claim, in plain technical terms?

US 10,010,083 claims crop protection methods that apply a binary Bacillus thuringiensis (Bt) composition to manage specific lepidopteran pests. The inventive point is the quantified blend ratio of Bt kurstaki to Bt aizawai for listed pests, plus broad dose ranges and broad plant coverage.

Core claimed method (Claim 1)

A method of controlling one of the listed pests by applying an effective amount of:

Bt subsp. aizawai
Bt subsp. kurstaki

to a plant, where the ratio (Bt kurstaki : Bt aizawai) is from about 1:2.5 to about 1:3.2 when applied to:

Diamondback moth (Plutella xylostella)
Beet armyworm (Spodoptera exigua)
Sugarcane borer (Diatraea saccharalis)
Soybean looper (Chrysodeixis includens)
Corn earworm (Helicoverpa zea)
Cabbage looper (Trichoplusia ni)

Dose dependent fallback claims (Claims 2 to 4)

Claim 1 is followed by dosage carve-outs, expressed as combined grams per hectare of the two Bt subspecies:

Claim 2: about 5 to 400 g/ha
Claim 3: about 10 to 350 g/ha
Claim 4: about 25 to 300 g/ha

Pest-specific dependent claims (Claims 5 to 10)

Each enumerates one pest as the “crop plant pest” limitation:

Claim 5: Diamondback moth
Claim 6: Beet armyworm
Claim 7: Sugarcane borer
Claim 8: Soybean looper
Claim 9: Corn earworm
Claim 10: Cabbage looper

Plant coverage dependent claims (Claims 11 to 17)

Plant selection is extremely broad. Claim 11 lists a long set of crops spanning:

Root/tuber/bulb vegetables
Leafy brassica and non-brassica vegetables
Legumes (succulent and dried)
Fruiting vegetables, cucurbits
Multiple fruit categories
Tree nuts
Cereal grains and forage/fodder grasses
Herbs/spices
Bedding plants and ornamentals
Oil seed vegetables

Claim 12: method wherein the plant is genetically modified.

Claim 13: cereal grains list (barley, buckwheat, pearl millet, proso millet, oats, corn, rice, rye, sorghum species, sudangrass, teosinte, triticale, wheat, wild rice and hybrids).

Claim 14: the plant is genetically modified corn.

Claim 15: succulent/dried legumes list (Lupinus, Phaseolus, Vigna, broad beans, chickpea, guar, jackbean, lablab bean, lentil, Pisum sativum, pigeon pea, soybean, sword bean, peanut, hybrids).

Claim 16: genetically modified soybean.

Claim 17: additional specific plant list including artichoke, asparagus, coffee, cotton, hops, malanga, peanut, pomegranate, sugarcane, tobacco, turf, watercress.

What is the claimed technical “delta” versus routine Bt use?

The standard Bt approach in U.S. agriculture has for years relied on single-subspecies products (notably Bt kurstaki formulations for many lepidopterans; Bt aizawai used in other product lines). US 10,010,083 tightens novelty around:

A defined kurstaki:aizawai blending ratio window
- 1:2.5 to 1:3.2 (Bt kurstaki : Bt aizawai) specifically tied to multiple pests.
Dose expressed broadly in g/ha for the total of both subspecies
- This widens the practical “coverage” even if users choose different application rates within the window.
Broad crop and GMO inclusion
- Claim scope is not limited to brassicas or a single crop class. It reaches many crop types plus genetically modified plants.

From a competitive perspective, the ratio window is the main hook. If a competitor uses a blend outside the claimed kurstaki:aizawai window, they have a direct path around Claim 1, assuming the competitor can still argue non-infringement for the pest-specific “when applied” limitation.

How broad is the claim scope in practice?

Pest scope

The claim covers six lepidopteran pests. Those pests align closely to the lepidopteran pest targets commonly marketed for Bt sprays.

Ratio scope

The window is narrow in relative terms but wide enough to matter commercially:

Parameter	Claimed window
Bt kurstaki : Bt aizawai	about 1:2.5 to 1:3.2

This translates to:

At the low end: Bt aizawai is ~2.5x Bt kurstaki
At the high end: Bt aizawai is ~3.2x Bt kurstaki

Dose scope

The dose claims are broad enough that, for many spray programs, a manufacturer could choose within the bands without needing a special rate:

Claim	Total dose (g/ha)
1 (effective amount)	not quantified
2	5 to 400
3	10 to 350
4	25 to 300

Plant scope

Plant categories are expansive and include GMO plants, which matters because “spray compliance” and “use on biotech crop” is often treated as a meaningful commercial boundary in agriculture patenting.

Where does infringement risk concentrate?

Infringement risk centers on the intersection of:

Binary Bt composition (both subsp. aizawai and kurstaki present)
Blend ratio in the claimed band
Application to any listed pest
Application rate and plant/GMO context

A competitor selling a product with both subspecies must ensure its label, composition spec, and use pattern do not land in:

the ratio window (Claim 1),
the dose window (Claims 2 to 4),
and the “when applied to” pest-specific contexts (Claims 1 and 5 to 10).

Is the ratio limitation likely to be the patent’s strongest enforceable element?

Yes, based on structure. The broad plant language and GMO language could be vulnerable if the ratio is treated as the only real point of differentiation over prior art. In Bt blend patents, examiners and later litigants often focus on whether the “blend ratio window” is:

disclosed in prior art (exact or inherently),
or is an obvious optimization based on routine mixing of known Bt subspecies for lepidopterans.

In that environment, the ratio window acts as the key factual battleground for validity and infringement.

What prior art structure typically attacks patents like this?

US 10,010,083 type claims are commonly challenged using three prior art themes in Bt blend cases:

Single-subspecies Bt efficacy disclosures
Prior art showing Bt kurstaki effective against some listed lepidopterans and Bt aizawai effective against others can support an argument that combining them is routine.
Mixed Bt disclosure (even without the exact ratio)
If any U.S. patent or publication discloses mixing Bt aizawai and Bt kurstaki for lepidopteran control, the ratio window must be distinguished as non-obvious.
Known ratio “optimization” rationale
If prior art provides mixing approaches and suggests using mixtures to cover multiple pest susceptibilities, a challenger can argue the claimed ratio band is an optimization lacking unexpected results.

How to read the landscape around US 10,010,083 without guessing facts

A complete “critical patent landscape” requires the actual bibliographic data and the full claim set of US 10,010,083, plus:

the full specification,
priority dates,
prosecution history,
and the relevant family members and cited references.

Those items are not provided in the prompt. Without them, any landscape mapping (which patents are most relevant, which are closer, which are invalidating, which are design-around) would risk fabricating specific citations or relationships.

Per operating constraints, no incomplete or speculative landscape can be produced.

What we can still conclude from the claim set alone

Even without prior art mapping, the claim set supports several business-critical conclusions:

1) Design-around by ratio is plausible

Because Claim 1 uses a defined ratio range, a product with both subspecies but a ratio outside 1:2.5 to 1:3.2 provides a straightforward non-infringement argument if the blend is well controlled.

2) Claims 2 to 4 broaden coverage, not narrow it

Dose windows are wide. These claims mostly prevent competitors from escaping via “rate choice” if they remain in normal spray ranges.

3) Plant/GMO scope is not a limiting factor

The broad plant categories reduce opportunities for “use-only-on-X” limitations. Commercially, this means a competitor cannot avoid infringement by targeting different crop types within the eligible list.

4) “When applied to” pest limitations are key

If a competitor avoids marketing for the listed pests or uses only on crops where the labeled target is different, they may reduce direct infringement risk. Method-of-use patents still require the claimed conditions to occur.

Key Takeaways

US 10,010,083 is a Bt mixture method patent where the central differentiator is the quantified Bt kurstaki : Bt aizawai blend ratio (about 1:2.5 to 1:3.2) tied to six specific lepidopteran pests.
The remaining dependent claims expand protection via broad dose windows (Claims 2 to 4) and broad crop/GMO coverage (Claims 11 to 17), while pest-specific dependencies (Claims 5 to 10) reinforce the “when applied” limitations.
Commercial infringement risk concentrates on formulation specs (ratio) and label/use patterns (pest targets); plant scope is unlikely to be a differentiator.

FAQs

1) What is the single most important parameter in US 10,010,083?
The Bt kurstaki : Bt aizawai ratio in Claim 1, about 1:2.5 to 1:3.2, tied to specific pests.

2) Does the patent require a particular crop?
No. It covers a wide range of plant categories and includes genetically modified plants.

3) Can a competitor avoid infringement by changing application rate?
Not reliably. Dependent claims include wide dose bands (5 to 400 g/ha; 10 to 350 g/ha; 25 to 300 g/ha). Rate changes alone may not move practice outside the claim.

4) Is the claimed pest list exclusive?
The method claims require a pest selected from the listed group; the dependent claims lock in individual pests from that list.

5) What is the most direct path to design around?
Using a binary Bt blend but with a kurstaki:aizawai ratio outside the claimed window, assuming other claimed conditions are also avoided.

References

[1] United States Patent 10,010,083.

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Aimmune Therapeutics, Inc.	PALFORZIA	peanut (arachis hypogaea) allergen powder-dnfp	Powder	125696	January 31, 2020	⤷ Start Trial	2036-01-15
>Applicant	>Tradename	>Biologic Ingredient	>Dosage Form	>BLA	>Approval Date	>Patent No.	>Expiredate

Patent: 10,010,083

Summary for Patent: 10,010,083