US3261104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of polyvinyl alcohol film
Assignee: Kurashiki Rayon Co Ltd
•
Filing: 1962-12-04
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Granted: 1966-07-19
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Expires: 1982-12-04
Abstract
No abstract record available.
Inventors
- 👤 Sakakibara Seiichi
- 👤 Nakahari Keisuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:29
CPC Classifications
F; F26; F26B; F26B19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR FABRICATING PRODUCTS FROM POLYVINYL ALCOHOL FILM WHICH COMPRISES CONTINUOUSLY AND UNIFORMLY HEATING BOTH SIDES OF A RELATIVELY MOIST POLYVINYL ALCOHOL FILM IN FIRST AND SECOND HEATING ZONES TO REDUCE THE MOISTURE CONTENT OF SAID FILM TAKEN FROM THE SECOND HEATING ZONE TO ABOUT 3 TO 4% BY WEIGHT, THE TEMPERATURE IN THE
Claim 2
Dependent Claim
55 words
A PROCESS FOR FABRICATING PRODUCTS FROM POLYVINYL ALCOHOL FILM WHICH COMPRISES CONTINUOUSLY AND UNIFORMLY HEATING BOTH SIDES OF A RELATIVELY MOIST POLYVINYL ALCOHOL FILM IN FIRST AND SECOND HEATING ZONES TO REDUCE THE MOISTURE CONTENT OF SAID FILM TAKEN FROM THE SECOND HEATING ZONE TO ABOUT 3 TO 4% BY WEIGHT, THE TEMPERATURE IN THE
References Cited (Backward Citations)
US2239718A
Cited
US2603838A
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US2862303A
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US2812550A
Cited
US2955345A
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US3061884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |