US2963465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certification of correction
Assignee: —
•
Filing: —
•
Granted: 1960-12-06
•
Expires: 1977-12-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:11
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/30; C08G18/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PROCESS FOR THE MANUFACTURE OF A LINEAR, HIGHLY POLYMERIC POLYUREA WHICH INCLUDES THE STEPS OF REACTING A DIAMINE WITH CARBONYL SULFIDE TO PRODUCE A THIOCARBAMIC ACID SALT HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
32 words
A PROCESS FOR THE MANUFACTURE OF A LINEAR, HIGHLY POLYMERIC POLYUREA WHICH INCLUDES THE STEPS OF REACTING A DIAMINE WITH CARBONYL SULFIDE TO PRODUCE A THIOCARBAMIC ACID SALT HAVING THE GENERAL FORMULA:
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |