Patent US3249631A successfully refreshed from Google Patents.
US3249631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrate ester of polyvinylene glycol
Assignee: Individual
•
Filing: 1956-08-10
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Granted: 1966-05-03
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Expires: 1976-08-10
Abstract
No abstract record available.
Inventors
- 👤 Louis M Soffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:08
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
POLYVINYLENE GLYCOL DINITRATE HAVING A SOFTENING POINT BETWEEN 70*C. AND 300*C.
Claim 2
Dependent Claim
11 words
POLYVINYLENE GLYCOL DINITRATE HAVING A SOFTENING POINT BETWEEN 70*C. AND 300*C.
References Cited (Backward Citations)
US913653A
Cited
US1660651A
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US2118487A
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US2455937A
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US2396330A
Cited
US2571883A
Cited
US2722525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |