US2569132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of triketones
Assignee: Shell Development Co
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Filing: 1948-06-22
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Granted: 1951-09-25
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Expires: 1968-06-22
Abstract
No abstract record available.
Inventors
- 👤 Donald S Melstrom
- 👤 Roy T Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:34
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/04; C07C49/12; C07C45/00; C07C45/61; C07C45/67; C07C45/76; C07C49/14; C07C49/385; C07C49/403; C07C49/76; C07C49/80; C07C49/807
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
IN A PROCESS FOR THE PRODUCTION OF A TRIKETONE BY REACTING A KETENE WITH A BETA-DIKETONE WHEREIN THE CARBON ATOM BETWEEN THE CARBONYL CARBON ATOMS IS ATTACHED TO AT LEAST ONE HYDROGEN ATOM, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID REACTION IN THE PRESENCE OF AN ORGANIC EROXIDE, AND AT A TEMPERATURE SUFFICIENTLY HIGH TO EFFECT DISSOCIATION OF SAID PEROXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |