US3141900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel unsaturated isocyanates and process for preparation
Assignee: Union Carbide Corp
•
Filing: 1961-02-10
•
Granted: 1964-07-21
•
Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 John W Lynn
- 👤 Thomas K Brotherton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/06; C08G18/70; C08G18/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
UNSATURATED ISOCYANATES REPRESENTED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
7 words
UNSATURATED ISOCYANATES REPRESENTED BY THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2683160A
Cited
US2942026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |