Patent US4120874A successfully refreshed from Google Patents.
US4120874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diesters of 6-cyano-2,2-tetrahydropyrandicarboxylates
Assignee: Monsanto Co
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Filing: 1977-01-05
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Granted: 1978-10-17
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Expires: 1997-01-05
Abstract
Abstract A compound of the formula ##STR1## wherein R' is lower alkyl, is useful as an intermediate in the preparation of a corresponding tricarboxylate, which is a useful detergent builder.
Inventors
- 👤 Marvin M. Crutchfield
- 👤 Kent P. Lannert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:14
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/12; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07D307/24; C07D309/00; C07D309/02; C07D309/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A compound of the formula ##STR20## wherein R' is lower alkyl.
Claim 2
Dependent Claim
11 words
A compound of the formula ##STR20## wherein R' is lower alkyl.
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) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |