Patent US3575951A successfully refreshed from Google Patents.
US3575951A
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Reaction of singlet oxygen with raw materials from naval stores
Assignee: United States Department of Agriculture
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Filing: 1968-11-14
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Granted: 1971-04-20
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Expires: 1988-11-14
Abstract
Abstract LEVOPIMARIC ACID TRANSANNULAR PEROXIDE AND A PLURALITY OF MIXED PEROXIDES WERE PREPARED BY THE REACTION OF SINGLET OXYGEN WITH LEVOPIMARIC ACID, PINE GUM, GUM ROSIN, THE SODIUM SALT OF PINE GUM, PARTIALLY NEUTRALIZED GUM ROSIN, TALL OIL ROSIN, WOOD ROSIN, AND OTHER NAVAL STORES PRODUCTS.
Inventors
- 👤 Walter H Schuller
- 👤 Ray V Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:03
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; C08; C08F; C08F283/00; C08F283/01; C08F4/00; C08F4/28; C08F4/32
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |