Patent US3641201A successfully refreshed from Google Patents.
US3641201A
Expired / Lapsed
US
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Acid resistant polyester resins
Assignee: Gulf Research and Development Co
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Filing: 1969-11-10
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Granted: 1972-02-08
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Expires: 1989-11-10
Abstract
Abstract THE ACID RESISTANCE AND FLEXURAL STRENGTH OF CROSS-LINKED POLYESTER RESINS IS INCREASED BY USING SMALL AMOUNTS OF GLYCIDYL METHACRYLATE OR GLYCIDYL ACRYLATE IN THEIR PREPARATION.
Inventors
- 👤 William J Heilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:19
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F220/32; C08F220/325; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |