Patent US2944086A successfully refreshed from Google Patents.
US2944086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 1-bis(3, 5-dialkyl-4-hydroxyphenyl) methanes
Assignee: Ethyl Corp
•
Filing: 1955-09-23
•
Granted: 1960-07-05
•
Expires: 1975-09-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Coffield
- 👤 Allen H Filbey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:00
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/20; C07C39/00; C07C39/12; C07C39/15; C07C39/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
1,1,-BIS-(3,5 - DIALKYL-4-HYDROXYPHENYL) METHANES HAVING THE FORMULA
Claim 2
Dependent Claim
7 words
1,1,-BIS-(3,5 - DIALKYL-4-HYDROXYPHENYL) METHANES HAVING THE FORMULA
References Cited (Backward Citations)
US2734924A
Cited
US2735872A
Cited
US2515908A
Cited
US2506486A
Cited
US2538355A
Cited
US2647102A
Cited
US2691001A
Cited
US2807653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |