Patent US2974160A successfully refreshed from Google Patents.
US2974160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyanoethylation process
Assignee: Monsanto Chemicals Ltd
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Filing: 1957-12-11
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Granted: 1961-03-07
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Expires: 1977-12-11
Abstract
No abstract record available.
Inventors
- 👤 Heininger Samuel Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:36
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/01; C07C255/11; C07C255/13; C07C253/00; C07C253/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE METHOD WHICH COMPRISES HEATING ACRYLONITRILE WITH A PHENOL HAVING THE FORMULA
Claim 2
Independent Claim
12 words
THE METHOD WHICH COMPRISES HEATING ACRYLONITRILE WITH A PHENOL HAVING 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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |