US2704753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of low molecular weight polymers of vinyl acetate
Assignee: Shawinigan Resins Corp
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Filing: 1952-05-22
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Granted: 1955-03-22
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Expires: 1972-05-22
Abstract
No abstract record available.
Inventors
- 👤 Leo J Monaghan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS OF PRODUCING POLYINYL ACETATE HAVING VISCOSITIES WITHIN THE RANGE OF FROM ABOUT 1 TO 3 CENTIPOISES (IN A ONE-MOLAR SOLUTION OF BENZENE AT 20*C.), WHICH COMPRISES HEATING UNDER REFLUX AT TEMPERATURES BETWEEN 60*C. AND 100*C. AND AGITATING A SYSTEM COMPOSED OF 100 PARTS OF VINYL ACETATE MONOMER, FROM 0.02 TO 1.0 PART OF HYDROGEN PEROXIDE, A WATER-SOLUBLE ALKALI METAL SALT OF AN ORGANIC CARBOXYLIC ACID, AT LEAST 4 PARTS OF WATER AND FROM 20 TO 180 PARTS OF AN ORGANIC SOLVENT FOR THE POLYVINYL ACETATE, THE MAJOR PORTION OF WHICH SOLVENT IS A KETONE HAVING THE FORMULA:
Claim 2
Dependent Claim
99 words
A PROCESS OF PRODUCING POLYINYL ACETATE HAVING VISCOSITIES WITHIN THE RANGE OF FROM ABOUT 1 TO 3 CENTIPOISES (IN A ONE-MOLAR SOLUTION OF BENZENE AT 20*C.), WHICH COMPRISES HEATING UNDER REFLUX AT TEMPERATURES BETWEEN 60*C. AND 100*C. AND AGITATING A SYSTEM COMPOSED OF 100 PARTS OF VINYL ACETATE MONOMER, FROM 0.02 TO 1.0 PART OF HYDROGEN PEROXIDE, A WATER-SOLUBLE ALKALI METAL SALT OF AN ORGANIC CARBOXYLIC ACID, AT LEAST 4 PARTS OF WATER AND FROM 20 TO 180 PARTS OF AN ORGANIC SOLVENT FOR THE POLYVINYL ACETATE, THE MAJOR PORTION OF WHICH SOLVENT IS A KETONE HAVING THE FORMULA:
References Cited (Backward Citations)
US2440318A
Cited
US2485141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |