US2632744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polymerized polyester resin materials of improved strength and water resistance
Assignee: Libbey Owens Ford Glass Co
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Filing: 1947-01-31
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Granted: 1953-03-24
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Expires: 1967-01-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur M Howald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:11
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/3179
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A MATERIAL WHICH UPON POLYMERIZATION HAS IMPROVED STRENGTH AND WATER RESISTANCE, COMPRISING 100 PARTS OF A POLYMERIZABLE OLEFINICALLY UNSATURATED POLYHYDRIC ALCOHOL-POLYCARBOXYLIC ACID POLYESTER AND FROM 1 TO 400 PARTS OF A MATERIAL CONSISTING SUBSTANTIALLY OF FINELY DIVIDED CELLULOSE IMPREGNATED WITH FROM 1/200 TO 10 TIMES ITS WEIGHT OF AN INFUSBLE REACTION PRODUCT OF FORMALDEHYDE AND A SUBSTANCE OF THE CLASS CONSISTING OF UREA AND MELAMINE.
Claim 2
Dependent Claim
65 words
A MATERIAL WHICH UPON POLYMERIZATION HAS IMPROVED STRENGTH AND WATER RESISTANCE, COMPRISING 100 PARTS OF A POLYMERIZABLE OLEFINICALLY UNSATURATED POLYHYDRIC ALCOHOL-POLYCARBOXYLIC ACID POLYESTER AND FROM 1 TO 400 PARTS OF A MATERIAL CONSISTING SUBSTANTIALLY OF FINELY DIVIDED CELLULOSE IMPREGNATED WITH FROM 1/200 TO 10 TIMES ITS WEIGHT OF AN INFUSBLE REACTION PRODUCT OF FORMALDEHYDE AND A SUBSTANCE OF THE CLASS CONSISTING OF UREA AND MELAMINE.
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) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |