US3463769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diepoxide from levopimaric acid transannular peroxide
Assignee: United States Department of Agriculture
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Filing: 1964-04-02
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Granted: 1969-08-26
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Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 Walter H Schuller
- 👤 Ray V Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:59
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C07D493/00; C07D493/02; C07D493/10; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE PRODUCT PREPARED BY THE PROCESS OF THERMALLY REARRANGING THE MIXED TRANSANNULAR PEROXIDES RESULTING FROM THE PHOTOSENSITIZED OXIDATION OF PINE GUM TO GIVE THE CORRESPONDING DIEPOXIDES WHICH PROSCESS COMPRISES THE FOLLOWING OPERATIONS PERFORMED IN SEQUENCE: (A) HEATING THE PHOTOSENSITIZED OXIDIZED PINE GUM IN AN INERT ORGANIC SOLVENT WITH STIRRING TO A TEMPERATURE OF ABOUT 110*-265*C. (B) CONTAINING THE HEATING AT SAID TEMPERATURE UNTIL THE PEROXIDE CONTENT IS REDUCED TO ESSENTIALLY ZERO, (C) REMOVING THE SOLVENT BY STRIPPING UNDER REDUCED PRESSURED, AND (D) RECOVERING THE THERMALLY REARRANGED PRODUCTS BY DRYING IN VACUO.
Claim 2
Dependent Claim
91 words
THE PRODUCT PREPARED BY THE PROCESS OF THERMALLY REARRANGING THE MIXED TRANSANNULAR PEROXIDES RESULTING FROM THE PHOTOSENSITIZED OXIDATION OF PINE GUM TO GIVE THE CORRESPONDING DIEPOXIDES WHICH PROSCESS COMPRISES THE FOLLOWING OPERATIONS PERFORMED IN SEQUENCE: (A) HEATING THE PHOTOSENSITIZED OXIDIZED PINE GUM IN AN INERT ORGANIC SOLVENT WITH STIRRING TO A TEMPERATURE OF ABOUT 110*-265*C. (B) CONTAINING THE HEATING AT SAID TEMPERATURE UNTIL THE PEROXIDE CONTENT IS REDUCED TO ESSENTIALLY ZERO, (C) REMOVING THE SOLVENT BY STRIPPING UNDER REDUCED PRESSURED, AND (D) RECOVERING THE THERMALLY REARRANGED PRODUCTS BY DRYING IN VACUO.
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) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |