US2980694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of maleimides
Assignee: Union Carbide Corp
•
Filing: 1959-11-05
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Granted: 1961-04-18
•
Expires: 1979-11-05
Abstract
No abstract record available.
Inventors
- 👤 Carol K Sauers
- 👤 Robert J Cotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:03
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
PROCESS FOR THE PREPARATION OF AN N-SUBSTITUTED MALEIMIDE WHICH COMPRISES CONTACTING AN N-SUBSTITUTED ISOMALEIMIDE HAVING THE FORMULA:
Claim 2
Dependent Claim
17 words
PROCESS FOR THE PREPARATION OF AN N-SUBSTITUTED MALEIMIDE WHICH COMPRISES CONTACTING AN N-SUBSTITUTED ISOMALEIMIDE HAVING THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |