US3138571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antioxidants and antiozonants
Assignee: Pennwalt Corp
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Filing: 1960-04-05
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Granted: 1964-06-23
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Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 Ivan C Popoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:48
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/405; C07; C07C; C07C275/00; C07C275/28; C07C275/40; C07C335/00; C07C335/04; C07C335/16; C07C335/20; C08K5/16; C08K5/17; C08K5/18; C08K5/21; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
COMPOUNDS HAVING THE STRUCTURE F WHERE R1 IS A MEMBER SELECTED FROM THE GROUP CONSISITING OF ALKY, ALKENYL, CYCOLALKENYL, CYCLOALKYL, AND ARYL RADICALS, SAID R1 RADICALS CONTAINING FROM ONE TO TWELVE CARBON ATOMS, R2 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, R1, AND
Claim 2
Dependent Claim
45 words
COMPOUNDS HAVING THE STRUCTURE F WHERE R1 IS A MEMBER SELECTED FROM THE GROUP CONSISITING OF ALKY, ALKENYL, CYCOLALKENYL, CYCLOALKYL, AND ARYL RADICALS, SAID R1 RADICALS CONTAINING FROM ONE TO TWELVE CARBON ATOMS, R2 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, R1, AND
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |