US3254036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable carbodiimide polymers
Assignee: Ethyl Corp
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Filing: 1962-04-27
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Granted: 1966-05-31
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Expires: 1982-04-27
Abstract
No abstract record available.
Inventors
- 👤 Gene C Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:05
CPC Classifications
C; C08; C08G; C08G73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A PROCESS FOR ENHANCING THE THERMAL STABILITY OF A SOLID CARBODIMIDE POLYMER COMPSED OF THE RECURRING STRUCTURAL UNIT
Claim 2
Dependent Claim
18 words
A PROCESS FOR ENHANCING THE THERMAL STABILITY OF A SOLID CARBODIMIDE POLYMER COMPSED OF THE RECURRING STRUCTURAL UNIT
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |