US3180883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4, 4'-diisocyanato-3, 5-di-lower alkyl-diphenylmethane
Assignee: Individual
•
Filing: 1960-07-18
•
Granted: 1965-04-27
•
Expires: 1980-07-18
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/7671; C08G18/77
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2511544A
Cited
US2683730A
Cited
US2729666A
Cited
US2757184A
Cited
GB779806A
Cited
US2858296A
Cited
US3115479A
Cited
US2908704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |