US2721186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of n-carbamylamic acid esters
Assignee: Uniroyal Inc
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Filing: 1953-11-30
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Granted: 1955-10-18
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Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Pliny O Tawney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:07
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1854; C08; C08F; C08F22/00; C08F22/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN INTERPOLYMER OF MALEURIC ACID ESTER OF AN ALIPHATIC POLYOL CONTAINING A NON-TERTIARY ALCOHOLIC HYDROXYL GROUP WITH A COPOLYMERIZABLE ETHYLENIC COMPOUND CONTAINING AT LEAST ON TERMINAL ETHYLENIC GROUP AND IN WHICH, IN THE CASE OF A PLURALITY OF SUCH GROUPS, SAID GROUPS ARE NON-CONJUGATED WITH EACH OTHER.
Claim 2
Dependent Claim
15 words
AN INTERPOLYMER AS SET FORTH IN CLAIM 7, IN WHICH THE POLYCOL IS CASTOR OIL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |