US2797234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary carbinyl esters and their preparation
Assignee: F Hoffmann La Roche AG
•
Filing: 1955-03-02
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Granted: 1957-06-25
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Expires: 1975-03-02
Abstract
No abstract record available.
Inventors
- 👤 James A Birbiglia
- 👤 George O Chase
- 👤 Galender Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:19
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0007; C11B9/0015; C11B9/0019; C07; C07C; C07C67/00; C07C67/28; C07C67/283; C07C69/00; C07C69/02; C07C69/04; C07C69/06; C07C69/07; C07C69/12; C07C69/14; C07C69/145; C07C69/22; C07C69/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS OF MAKING A TERTIARY CARBINYL ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS OF MAKING A TERTIARY CARBINYL ESTER HAVING THE FORMULA
References Cited (Backward Citations)
DE601070C
Cited
US2423545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |