US2941966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbodiimide polymers
Assignee: EIDP Inc
•
Filing: 1956-08-27
•
Granted: 1960-06-21
•
Expires: 1976-08-27
Abstract
No abstract record available.
Inventors
- 👤 Tod W Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:53
CPC Classifications
C; C08; C08G; C08G73/00; C08G18/00; C08G18/02; C08G18/025; C08G18/06; C08G18/08; C08G18/10; C08G2101/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A CROSS-LINKED INFUSIBLE POLYMER CONSISTING ESSENTIALLY OF INTRALINEAR CARBONDIIMIDE LINKAGES ALTERNATING WITH ORGANIC RADICALS WHICH ARE FREE OF ANY SUBSTITUTENTS REACTIVE WITH AN ISOCYANATE GROUP, THERE BEING AT LEAST THREE CARBODIIMIDE LINKAGES PER MOLECULE.
Claim 2
Dependent Claim
34 words
A CROSS-LINKED INFUSIBLE POLYMER CONSISTING ESSENTIALLY OF INTRALINEAR CARBONDIIMIDE LINKAGES ALTERNATING WITH ORGANIC RADICALS WHICH ARE FREE OF ANY SUBSTITUTENTS REACTIVE WITH AN ISOCYANATE GROUP, THERE BEING AT LEAST THREE CARBODIIMIDE LINKAGES PER MOLECULE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |