US3271366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic polyiminolactones
Assignee: EIDP Inc
•
Filing: 1963-11-21
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Granted: 1966-09-06
•
Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 Kreuz John Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:49
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
18 words
A PROCESS FOR PREPARING POLYIMINOLACTONE WHICH COMPRISES TREATING A POLYAMIDE-ACID CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
18 words
A PROCESS FOR PREPARING POLYIMINOLACTONE WHICH COMPRISES TREATING A POLYAMIDE-ACID CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
References Cited (Backward Citations)
US3179633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |