Patent US2952668A successfully refreshed from Google Patents.
US2952668A
Expired / Lapsed
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N-vinyl-3-morpholinone copolymers
Assignee: Dow Chemical Co
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Filing: 1958-04-16
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Granted: 1960-09-13
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Expires: 1978-04-16
Abstract
No abstract record available.
Inventors
- 👤 Forrest A Ehlers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:22
CPC Classifications
C; C08; C08F; C08F226/00; C08F226/06; B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5254; D; D06; D06P; D06P1/00; D06P1/44; D06P1/52; D06P1/5207; D06P1/5214; D06P1/5242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
DYE-RECEPTIVE, WATER-INSOLUBLE, NORMALLY SOLID, CROSS-LINKED COPOLYMER OF (A) FROM BETWEEN ABOUT 2 AND 98 WEIGHT PERCENT, BASED ON THE COPOLYMER, OF AN NVINYL-13-MORPHOLINONE MONOMER OF THE FORMULA:
Claim 2
Dependent Claim
27 words
DYE-RECEPTIVE, WATER-INSOLUBLE, NORMALLY SOLID, CROSS-LINKED COPOLYMER OF (A) FROM BETWEEN ABOUT 2 AND 98 WEIGHT PERCENT, BASED ON THE COPOLYMER, OF AN NVINYL-13-MORPHOLINONE MONOMER OF THE FORMULA:
References Cited (Backward Citations)
US2801224A
Cited
US2818362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |