US2834789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing lower lakyl 2, 3, 6-trihydroxybenzoate, and intermediates therefor
Assignee: Sadolin and Holmblad AS
•
Filing: 1955-02-15
•
Granted: 1958-05-13
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Expires: 1975-02-15
Abstract
No abstract record available.
Inventors
- 👤 Niels K F W Clauson-Kaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:36
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07C; C07C65/00; C07C65/01; C07C65/03; C07C65/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
LOWER ALKYL 2,5-DI(LOWER ALKOXY)-2,5-DIHYDRO-2FUROYL ACETATE.
Claim 2
Dependent Claim
5 words
LOWER ALKYL 2,5-DI(LOWER ALKOXY)-2,5-DIHYDRO-2FUROYL ACETATE.
References Cited (Backward Citations)
US2615042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |