US2663720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organic esters
Assignee: Ethyl Corp
•
Filing: 1951-09-28
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Granted: 1953-12-22
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Expires: 1971-09-28
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS WHICH COMPRISES INTERRRACTING AN ALCOHOL, A HALIDE OF A PERIODIC GROUP IV B METAL AND A MIXTURE CONTAINING AN ALKALI METAL AND AT LEAST 5% BY WEIGHT OF AN ALKALINE EARTH METAL.
Claim 2
Dependent Claim
34 words
A PROCESS WHICH COMPRISES INTERRRACTING AN ALCOHOL, A HALIDE OF A PERIODIC GROUP IV B METAL AND A MIXTURE CONTAINING AN ALKALI METAL AND AT LEAST 5% BY WEIGHT OF AN ALKALINE EARTH METAL.
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) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |