US2776994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a solid diphenylamine antioxidant
Assignee: Goodrich Corp
•
Filing: 1954-03-03
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Granted: 1957-01-08
•
Expires: 1974-03-03
Abstract
No abstract record available.
Inventors
- 👤 John S B Wolfe
- 👤 Lewis H Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD WHICH COMPRISES AGITATING A LIQUID COMPOSITION COMPRISING ESSENTIALLY FROM 80 TO 98% BY WEIGHT OF P,P''-DI-1,1,3,3-TETRAMETHYL BUTYL DIPENYLAMINE AND THE BALANCE P-1,1,3,3-TETRAMETHYL BUTYL DIPHENYLAMINE WHILE COOLING TO A TEMPERATURE OF FROM ABOUT 85 TO 100*C. TO PROVIDE A SEMISOLID MASS AND THEN RAPIDLY COOLING SAID MASS TO A TEMPERATURE SUBSTANTIALLY BELOW THE INITIAL CRYSTALLIZATION POINT TEMPERATURE OF THE COMPOSITION TO PROVIDE A SOLID, FRANGIBLE, DRY COMPOSITION HAVING A SET POINT OF AT LEAST ABOUT 80*C.
Claim 2
Independent Claim
77 words
THE METHOD WHICH COMPRISES AGITATING A LIQUID COMPOSITION COMPRISING ESSENTIALLY FROM 80 TO 98% BY WEIGHT OF P,P''-DI-1,1,3,3-TETRAMETHYL BUTYL DIPENYLAMINE AND THE BALANCE P-1,1,3,3-TETRAMETHYL BUTYL DIPHENYLAMINE WHILE COOLING TO A TEMPERATURE OF FROM ABOUT 85 TO 100*C. TO PROVIDE A SEMISOLID MASS AND THEN RAPIDLY COOLING SAID MASS TO A TEMPERATURE SUBSTANTIALLY BELOW THE INITIAL CRYSTALLIZATION POINT TEMPERATURE OF THE COMPOSITION TO PROVIDE A SOLID, FRANGIBLE, DRY COMPOSITION HAVING A SET POINT OF AT LEAST ABOUT 80*C.
References Cited (Backward Citations)
US2009480A
Cited
US2530769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |