US3050506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternization of vinyl chloroacetate polymers
Assignee: Wyeth Holdings LLC
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Filing: 1960-04-22
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Granted: 1962-08-21
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Expires: 1980-04-22
Abstract
No abstract record available.
Inventors
- 👤 David R Sexsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:53
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR THE REACTION OF A 1.5:1 TO 1:1.5 MOLAR RATIO HYDROPHOBIC VINYL HIGHER FATTY ACID ESTER-VINYL CHLOROACETATE COPOLYMER WITH A LIQUID PYRIDINE, WHICH CONSISTS ESSENTIALLY IN MIXING SAID COPOLYMER WITH UP TO ONE EQUIVALENT OF A PYRIDINE WHICH IS LIQUID AT A TEMPERATURE BELOW 200*C., AND MAINTAINING SAID MIXTURE AT A TEMPERATURE BETWEEN THE MELTING POINTS OF SAID COPOLYMER AND SAID PYRIDINE AND THE BOILING POINT OF SAID PYRIDINE UNTIL THE REACTION OF SAID PYRIDINE WITH SAID COPOLYMER IS SUBSTANTIALLY COMPLETE.
Claim 2
Dependent Claim
83 words
A PROCESS FOR THE REACTION OF A 1.5:1 TO 1:1.5 MOLAR RATIO HYDROPHOBIC VINYL HIGHER FATTY ACID ESTER-VINYL CHLOROACETATE COPOLYMER WITH A LIQUID PYRIDINE, WHICH CONSISTS ESSENTIALLY IN MIXING SAID COPOLYMER WITH UP TO ONE EQUIVALENT OF A PYRIDINE WHICH IS LIQUID AT A TEMPERATURE BELOW 200*C., AND MAINTAINING SAID MIXTURE AT A TEMPERATURE BETWEEN THE MELTING POINTS OF SAID COPOLYMER AND SAID PYRIDINE AND THE BOILING POINT OF SAID PYRIDINE UNTIL THE REACTION OF SAID PYRIDINE WITH SAID COPOLYMER IS SUBSTANTIALLY COMPLETE.
References Cited (Backward Citations)
US2118864A
Cited
GB697503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |