US3627780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-maleamic compounds
Assignee: Rhodiaceta SA
•
Filing: 1968-02-21
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Granted: 1971-12-14
•
Expires: 1988-02-21
Abstract
Abstract D R A W I N G
Inventors
- 👤 Lucien Bonnard
- 👤 Pierre Grosjean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448; C07D207/452; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A bis-imide of the formula:
Claim 2
Dependent Claim
5 words
A bis-imide of the formula:
Claim 3
Dependent Claim
5 words
A bis-imide of the formula:
Claim 4
Dependent Claim
5 words
A bis-imide of the formula:
Claim 5
Dependent Claim
5 words
A bis-imide of the formula:
Claim 6
Dependent Claim
5 words
A bis-imide of the formula:
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |