US3345342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyimide polymers
Assignee: EIDP Inc
•
Filing: 1966-05-31
•
Granted: 1967-10-03
•
Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Rudolph J Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:30
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1003; C08G67/00; Y; Y10; Y10S; Y10S525/00; Y10S525/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE PROCESS COMPRISING HEATING IN POLYIMINOLACTONE CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
14 words
THE PROCESS COMPRISING HEATING IN POLYIMINOLACTONE CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
References Cited (Backward Citations)
US3261811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |