US2774768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing basic ketones
Assignee: Hoechst AG
•
Filing: 1955-04-26
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Granted: 1956-12-18
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Expires: 1975-04-26
Abstract
No abstract record available.
Inventors
- 👤 Ehrhart Gustav
- 👤 Schmitt Karl
- 👤 Ott Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:25
CPC Classifications
A; A61; A61K; A61K31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
THE PROCESS OF PREPARING BASIC KETONES CORRESPONDING TO THE GENERAL FORMULA:
Claim 2
Dependent Claim
11 words
THE PROCESS OF PREPARING BASIC KETONES CORRESPONDING TO THE GENERAL FORMULA:
References Cited (Backward Citations)
GB698201A
Cited
US2676964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |