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Serving leading biopharmaceutical companies globally:

Cantor Fitzgerald
Cerilliant
Federal Trade Commission
Daiichi Sankyo
Argus Health
UBS
Citi
Cipla
US Department of Justice
Mallinckrodt

Generated: February 23, 2018

DrugPatentWatch Database Preview

Details for Patent: 4,057,323

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Summary for Patent: 4,057,323
Title: Projection screen
Abstract:Large projection screens, of which planetarium domes are typical, may conveniently be made up of a plural of prefinished panels, at least one edge of at least some of which panels overlaps another panel in a lap joint construction so that edges of the panels have a minimal effect upon light directed upon the screen from any angle. Panel edges overlapping another panel are tapered from a generally uniform thickness to substantially reduced thickness at the edge in a relatively short distance compared to panel dimensions and made to conform to and lay against the other panel. The panels are preferably made by a method which may involve either first shaping or finishing the projection surface of the dome panel. Each edge which will overlap another panel is then chamfered on the surface opposite the finished surface to form the taper. Finally the chamfered edge is deformed so that it will lay against and conform to the panel which it overlaps.
Inventor(s): Ward, Jr.; Robertson (Chicago, IL)
Assignee:
Application Number:05/727,255
Patent Claim Types:
see list of patent claims

Drugs Protected by US Patent 4,057,323

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted
Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted

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Serving hundreds of leading biopharmaceutical companies globally:

US Army
Chubb
Argus Health
Dow
Moodys
Merck
Federal Trade Commission
AstraZeneca
Covington

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