Patent US2957906A successfully refreshed from Google Patents.
US2957906A
Expired / Lapsed
US
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Ketones
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-10-25
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Granted: 1960-10-25
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Expires: 1975-10-25
Abstract
No abstract record available.
Inventors
- 👤 Floyd B Erickson
- 👤 Erhard J Prill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:41
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/30; C07C45/00; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/942
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
4 words
KETONES OF THE FORMULA
References Cited (Backward Citations)
US2144455A
Cited
GB582721A
Cited
US2407508A
Cited
US2471790A
Cited
US2576080A
Cited
US2773799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |