US2837770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing films from polyvinyl alcohol
Assignee: Consortium fuer Elektrochemische Industrie GmbH
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Filing: 1953-07-28
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Granted: 1958-06-10
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Expires: 1973-07-28
Abstract
No abstract record available.
Inventors
- 👤 Willy O Herrmann
- 👤 Winkler Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:23
CPC Classifications
B; B29; B29D; B29D7/00; B29D7/01
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
PROCESS FOR PRODUCING FILMS FROM A SOLUTION OF POLYVINYL ALCOHOL WHICH COMPRISES MOVING A CONVEYOR BAND THROUGH A BATH OF SAID SOLUTION, PRESSING SAID SOLUTION UPON BOTH SIDES OF SAID BAND WITH A ROLLING PRESSURE WHILE SAID BAND IS SUBMERGED IN SAID BATH, REMOVING THE FILMCOATED BAND FROM SAID SOLUTION, DRYING SAID COATED BAND,
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |