Patent US2951853A successfully refreshed from Google Patents.
US2951853A
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Method for preparing polyenecarboxylic acid derivatives
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1958-05-27
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Granted: 1960-09-06
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Expires: 1978-05-27
Abstract
No abstract record available.
Inventors
- 👤 Matsui Masanao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:12
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/42; C07C; C07C233/00; C07C233/01; C07C233/02; C07C403/00; C07C403/06; C07C403/08; C07C403/20; C07C51/00; C07C51/02; C07C51/09; C07C51/347; C07C51/353; C07C57/00; C07C57/30; C07C57/42; C07D307/54; C07B; C07B2200/00; C07B2200/09; C07C2601/00; C07C2601/12; C07C2601/16; Y; Y10; Y10S; Y10S260/00; Y10S260/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS FOR PREPARING A POLYENE-CARBOXYLIC ACID DERIVATIVE OF THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS FOR PREPARING A POLYENE-CARBOXYLIC ACID DERIVATIVE OF THE FORMULA
References Cited (Backward Citations)
US2662914A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |