Patent US3404396A successfully refreshed from Google Patents.
US2686773A
Expired / Lapsed
US
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Polymers and copolymers of the nu-pyridyl imide of maleic and citraconic acids
Assignee: Beazer East Inc
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Filing: 1951-08-31
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Granted: 1954-08-17
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Expires: 1971-08-31
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:46
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
THE POLYMERIZATION PRODUCT OBTAINED BY POLYMERIZING A MASS COMPRISING AN N- PYRIDYL IMIDE OF AN ACID SELECTED FROM THE CLASS CONSISTING OF MALEIC AND CITRACONIC ACIDS AND A POLYMERIZABLE MONOMER HAVING A CH2=C< GROUP.
Claim 2
Dependent Claim
34 words
THE POLYMERIZATION PRODUCT OBTAINED BY POLYMERIZING A MASS COMPRISING AN N- PYRIDYL IMIDE OF AN ACID SELECTED FROM THE CLASS CONSISTING OF MALEIC AND CITRACONIC ACIDS AND A POLYMERIZABLE MONOMER HAVING A CH2=C< GROUP.
References Cited (Backward Citations)
US2313565A
Cited
US2508860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |