US2989533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basically substituted diphenyl-carbinol esters and a process for preparing them
Assignee: Hoechst AG
•
Filing: 1958-07-15
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Granted: 1961-06-20
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Expires: 1978-07-15
Abstract
No abstract record available.
Inventors
- 👤 Stein Leonhard
- 👤 Lindner Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:13
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/092; B; B01; B01L; B01L9/00; B01L9/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF BASICALLY SUBSTITUTED ALPHA,ALPHA-DIPHENYL CARBINOL ESTERS OF THE FORMULA
Claim 2
Dependent Claim
16 words
THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF BASICALLY SUBSTITUTED ALPHA,ALPHA-DIPHENYL CARBINOL ESTERS OF THE FORMULA
Claim 3
Dependent Claim
5 words
THE COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
THE COMPOUND OF THE FORMULA
References Cited (Backward Citations)
GB683950A
Cited
US2827460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |