US2897127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing cross-linked polyvinyl alcohol
Assignee: General Electric Co
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Filing: 1955-08-29
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Granted: 1959-07-28
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Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Alexander A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; B; B29; B29C; B29C71/00; B29C71/04; C08F; C08F8/00; C08F8/12; C08F8/50; C08J3/28; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0844; B29C2035/085; B29C35/0866; B29C2035/0872; B29C2035/0877; B29C2035/0883; B29K; B29K2029/00; B29K2029/04; B29K2031/00; C08F2810/00; C08F2810/20; C08J2329/00; C08J2329/02; C08J2329/04; C08J2331/00; C08J2331/02; C08J2331/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS OF PREPARING CROSS-LINKED POLYVINYL ALCOHOL COMPRISING (1) IRRADIATING AN ESTER OF POLYVINYL ALCOHOL WITH ELECTRONS HAVING ENERGY EQUIVALENT TO AT LEAST 5 X 10 4 ELECTRON VOLTS TO A RADIATION DOSE IN THE RANGE OF +X 10 6 TO 5 X 10 7 R. AND (2) DEACYLATING SAID ESTER.
Claim 2
Dependent Claim
51 words
A PROCESS OF PREPARING CROSS-LINKED POLYVINYL ALCOHOL COMPRISING (1) IRRADIATING AN ESTER OF POLYVINYL ALCOHOL WITH ELECTRONS HAVING ENERGY EQUIVALENT TO AT LEAST 5 X 10 4 ELECTRON VOLTS TO A RADIATION DOSE IN THE RANGE OF +X 10 6 TO 5 X 10 7 R. AND (2) DEACYLATING SAID ESTER.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |