Patent US3221060A successfully refreshed from Google Patents.
US3221060A
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Process for the manufacture of storagestable alkylated bisphenol elastomer antioxidants
Assignee: Pennwalt Corp
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Filing: 1961-04-04
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Granted: 1965-11-30
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Expires: 1981-04-04
Abstract
No abstract record available.
Inventors
- 👤 Harry E Albert
- 👤 Paul G Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:22
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08; C07; C07C; C07C37/00; C07C37/11; C07C37/115; C07C37/14; C07C37/20; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
THE PROCESS OF PREPARING A LIQUID MIXTURE OF ALKYLATED BISXYLENOLS STABLE TO STORAGE WITHOUT FORMATION OF CRYSTALLINE BODIES BY CONDENSING A XYLENOL ALKYLATED WITH AN OLEFIN CONTAINING 4 TO 9 PERCENT ATOMS WITH AT LEAST A STOICHIMOETRIC AMOUNT OF A MIXTURE OF ALIPHATIC SATURATED ALDEHYDES, SAID ALDEHYDES CONTAINING 1 TO 9 CARBON ATOMS AND CONTAINING ONLY CARBON, HYDROGEN AND OXYGEN AND EACH OF SAID ALDEHYDES IN SAID ALDEHYDE MIXTURE BEING PRESENT IN AN AMONT OF AT LEAST ABOUT 5 MOLE PERCENT, SAID CONDENSATION BEING CARRIED OUT UNDER ACIDIC CONDITIONS AT A TEMPERATURE BETWEEN 20*C. AND 100*C.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |