US3244789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of thin condenser foils from plastics
Assignee: Bayer AG
•
Filing: 1962-06-22
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Granted: 1966-04-05
•
Expires: 1982-06-22
Abstract
No abstract record available.
Inventors
- 👤 Hofmeier Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:43
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29C48/9145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE PROCESS FOR THE PRODUCTION OF THIN CONDENSER FOILS OF A SYNTHETIC PLASTIC BASED UPON A FILM FORMING POLYMER WHEREIN SAID PLASTIC IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ETHERS, CELLULOSE ESTERS, POLYSTYRENE, POLYURETHANES, AND POLYCARBONATES BY COATING A SUPPORTING FOIL WITH A SOLUTION OF A PLASTIC IN A SOLVENT INERT TO THE SUPPORTING FOIL, DRYING THE PLASTIC COATING ON THE SUPPORTING FOIL TO FORM A THIN CONDENSER FILM ADHERING THERETO, AND STRIPPING SAID CONDENSER FOIL FROM THE SUPPORTING FOIL, THE IMPROVEMENT WHICH COMPRISES USING A CELLULOSE HYDRATE FOIL AS THE SUPPORTING FOIL.
Claim 2
Dependent Claim
97 words
IN THE PROCESS FOR THE PRODUCTION OF THIN CONDENSER FOILS OF A SYNTHETIC PLASTIC BASED UPON A FILM FORMING POLYMER WHEREIN SAID PLASTIC IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ETHERS, CELLULOSE ESTERS, POLYSTYRENE, POLYURETHANES, AND POLYCARBONATES BY COATING A SUPPORTING FOIL WITH A SOLUTION OF A PLASTIC IN A SOLVENT INERT TO THE SUPPORTING FOIL, DRYING THE PLASTIC COATING ON THE SUPPORTING FOIL TO FORM A THIN CONDENSER FILM ADHERING THERETO, AND STRIPPING SAID CONDENSER FOIL FROM THE SUPPORTING FOIL, THE IMPROVEMENT WHICH COMPRISES USING A CELLULOSE HYDRATE FOIL AS THE SUPPORTING FOIL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |