US2587540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of alpha-beta unsaturated ketones and aralkyl carboxylic acids
Assignee: Goodrich Corp
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Filing: 1950-03-22
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Granted: 1952-02-26
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Expires: 1970-03-22
Abstract
No abstract record available.
Inventors
- 👤 Forrest W Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/14; C07C403/16; C07C45/00; C07C45/56; C07C45/57; C07C45/59; C07C45/60; C07C45/61; C07C45/65; C07C49/00; C07C49/76; C07C49/794; C07C49/796; C07C49/80; C07C49/807; C07C49/84; C07C51/00; C07C51/09; C07C57/00; C07C57/30; C07C57/38; C07C57/40; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD WHICH COMPRISES FIRST ADMIXING A FRIEDEL-CRAFTS CATALYST AND A COMPOUND OF THE STRUCTURE AR-X WHEREIN AR IS AN ARYL RADICAL AND X IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN, HALOGEN AND ALKOXY RADICALS, MAINTAINING TE RESULTING MIXTURE AT A TEMPERATURE BELOW ABOUT 10* C., ADDING TO SAID MIXTURE A SATURATED ALIPHATIC BETA-LACTONE OF THE STRUCTURE
Claim 2
Independent Claim
59 words
THE METHOD WHICH COMPRISES FIRST ADMIXING A FRIEDEL-CRAFTS CATALYST AND A COMPOUND OF THE STRUCTURE AR-X WHEREIN AR IS AN ARYL RADICAL AND X IS A MEMBER OF THE CLASS CONSISTING OF HYDROGEN, HALOGEN AND ALKOXY RADICALS, MAINTAINING TE RESULTING MIXTURE AT A TEMPERATURE BELOW ABOUT 10* C., ADDING TO SAID MIXTURE A SATURATED ALIPHATIC BETA-LACTONE OF THE STRUCTURE
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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |