US3549670A
Expired / Lapsed
US
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Method of oxidizing phenols
Assignee: Chemopetrol Zavody Pro Zpracovani Ropy
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Filing: 1968-06-10
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Granted: 1970-12-22
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Expires: 1988-06-10
Abstract
No abstract record available.
Inventors
- 👤 Eduard Spousta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:16
CPC Classifications
C; C07; C07C; C07C46/00; C07C46/02; C07C46/06; C07C46/08; C07C41/00; C07C41/01; C07C43/00; C07C43/02; C07C43/257; C07C46/10; C07C50/00; C07C50/24; C07C50/26; C07C50/30; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/44
Claims Analysis
Total Claims: 0
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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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |