US3741989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lactonic acetals
Assignee: Abbott Laboratories
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Filing: 1970-10-27
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Granted: 1973-06-26
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Expires: 1990-10-27
Abstract
Abstract WHERE R is a lower alkyl group and R1 is an aryl group. Also covers their method of employment as herbicides. Covers lactonic acetals of the formula
Inventors
- 👤 H Zaugg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:47
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D203/00; C07D203/04; C07D203/06; C07D203/16; C07D203/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
4 words
4-Hydroxy-4-methoxy-2-benzamido-3,3-dimethylbutyric acid, gamma -lactone.
References Cited (Backward Citations)
US2659733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |