US2676949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of maleic anhydride and nu-vinyl lactams
Assignee: Monsanto Chemicals Ltd
•
Filing: 1952-02-08
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Granted: 1954-04-27
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Expires: 1972-02-08
Abstract
No abstract record available.
Inventors
- 👤 Richard R Morner
- 👤 Jr Raymond I Longley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:20
CPC Classifications
C; C08; C08F; C08F226/00; C08F226/06; C08F226/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A HETEROPOLYMER OF MALEIC ANHYDRIDE AND AN N-VINYL LACTAM.
Claim 2
Dependent Claim
9 words
A HETEROPOLYMER OF MALEIC ANHYDRIDE AND AN N-VINYL LACTAM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |