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Serving leading biopharmaceutical companies globally:

Farmers Insurance
Cantor Fitzgerald
Argus Health

Generated: December 13, 2017

DrugPatentWatch Database Preview

Details for Patent: 4,906,775

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Summary for Patent: 4,906,775

Title: Esters of 3-tert-butyl- and 3-tert-butyl-5-alkyl-4-hydroxyphenyl (alkane) carboxylic acids with oxyethylates of polythiols
Abstract:Esters of 3-tert-butyl- and 3-tert-butyl-5-alkyl-4-hydroxyphenyl (alkane) carboxylic acids with oxyethylates of polythiols are useful as stabilizers for polymers, especially for polyethylene and polypropylene.
Inventor(s): Kupper; Friedrich-Wilhelm (Marl, DE), Voges; Heinz-Werner (Dorsten, DE), Haage; Hans-Jurgen (Herne, DE)
Assignee: Huels Aktiengesellschaft (Marl, DE)
Application Number:07/122,724
Patent Claim Types:
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Compound; Process;

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Foreign Priority and PCT Information for Patent: 4,906,775

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Germany3639353Nov 18, 1986

International Patent Family for Patent: 4,906,775

Country Document Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Germany3639353► Subscribe
Germany3781511► Subscribe
European Patent Office0268039► Subscribe
JapanS63146855► Subscribe
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The estimated expiration dates shown above are derived by simply adding 20 years to the priority date.
Due to the complexity of determining patent expirations even in a single country, compounded by the diversity of global patent laws, it is advisable to have patent counsel verify freedom to operate.

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Serving leading biopharmaceutical companies globally:

Fish and Richardson
Johnson and Johnson
US Army
Cantor Fitzgerald
US Department of Justice

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