US3502601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polyurethanes and processes of preparing the same
Assignee: Individual
•
Filing: 1967-01-26
•
Granted: 1970-03-24
•
Expires: 1987-01-26
Abstract
No abstract record available.
Inventors
- 👤 Leslie C Case
- 👤 Laura K Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4291; C08G18/46; C08G18/4615; C08G63/00; C08G63/02; C08G63/12; C08G63/40; C08G63/42; C08G63/68; C08G63/685; C08G63/6854
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2779783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |