Patent US3007832A successfully refreshed from Google Patents.
US3007832A
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Sealing of alkali sensitive films and pellicles
Assignee: Akzo Nobel UK PLC
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Filing: 1956-11-01
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Granted: 1961-11-07
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Expires: 1976-11-01
Abstract
No abstract record available.
Inventors
- 👤 David T Milne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:55
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; B; B29; B29C; B29C53/00; B29C53/36; B29C53/38; B29C53/48; B29C53/50; B29C65/00; B29C65/48; B29C65/4895; B29C65/52; B29C65/54; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/49; B29C66/70; B29C66/73; B29C66/737; B29C66/7379; B29C66/73793; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81423; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; A22C2013/0066; A22C2013/0069; B29C66/71; B29K; B29K2001/00; B29L; B29L2023/00; B29L2023/001; B29L2023/002; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR THE PRODUCTION OF TUBULAR CASINGS COMPRISING GUIDING A FLEXIBLE SHEET OF A CELLULOSIC MATERIAL LONGITUDINALLY TO A FORMING POSITION, SAID SHEET BEING PREPARED FROM A STARTING MATERIAL CONTAINING AS AN ESSENTIAL COMPONENT A HYDROXYALKYL CELLULOSE ETHER AND SAID SHEET BEING PLASTICIZED WITH A MINOR AMOUNT OF UREA, CONTINUOUSLY SHAPING THE SHEET INTO A TUBULAR FORM WITH THE LONGITUDINAL EDGES OVERLAPPED, AND SEALING THE OVERLAPPED EDGES WITH AN ALKALINE SOLUTION SO AS TO FORM A SEALED TUBULAR CASING, THE UREA CONTENT OF THE SHEET COACTING WITH THE ALKALINE SEALING SOLUTION TO ACCELERATE THE SEALING PROCESS.
Claim 2
Dependent Claim
97 words
A PROCESS FOR THE PRODUCTION OF TUBULAR CASINGS COMPRISING GUIDING A FLEXIBLE SHEET OF A CELLULOSIC MATERIAL LONGITUDINALLY TO A FORMING POSITION, SAID SHEET BEING PREPARED FROM A STARTING MATERIAL CONTAINING AS AN ESSENTIAL COMPONENT A HYDROXYALKYL CELLULOSE ETHER AND SAID SHEET BEING PLASTICIZED WITH A MINOR AMOUNT OF UREA, CONTINUOUSLY SHAPING THE SHEET INTO A TUBULAR FORM WITH THE LONGITUDINAL EDGES OVERLAPPED, AND SEALING THE OVERLAPPED EDGES WITH AN ALKALINE SOLUTION SO AS TO FORM A SEALED TUBULAR CASING, THE UREA CONTENT OF THE SHEET COACTING WITH THE ALKALINE SEALING SOLUTION TO ACCELERATE THE SEALING PROCESS.
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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) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |