US3245865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic reinforced articles having improved surface characteristics and method therefor
Assignee: Union Carbide Corp
•
Filing: 1962-10-18
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Granted: 1966-04-12
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Expires: 1982-10-18
Abstract
No abstract record available.
Inventors
- 👤 Albert W Hawkins
- 👤 Thomas E Bugel
- 👤 Charles F Pitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
C; C08; C08J; C08J5/00; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/048; C08J2471/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
REINFORCED PLASTIC ARTICLE CONSISTING ESSENTIALLY OF A THERMOSET RESIN AND A REINFORCING MATERIAL IN A DESIRED CONFIGURATION AND ANCHORED THERETO A SMOOTH, TOUGH, PINHOLE-FREE SURFACE LAYER OF A THERMOPLASTIC POLYHYDROXY ETHER REACTION PRODUCT OF ABOUT 0.985 TO ABOUT 1.015 MOLES OF AN EPOXIDE, PER MOLE OF DIHYDRIC PHENOL, CHARACTERIZED BY HAVING ESSENTIALLY NO 1,2-EPOXY GROUPS, A DEGREE OF POLYMERIZATION OF AT LEAST 30, AND A REDUCED VISCOSITY MEASURED AT 25* AS A 0.2 GRAM SAMPLE IN 100 MILLILITERS OF TETRAHYDROFURAN OF AT LEAST ABOUT 0.5.
Claim 2
Dependent Claim
85 words
REINFORCED PLASTIC ARTICLE CONSISTING ESSENTIALLY OF A THERMOSET RESIN AND A REINFORCING MATERIAL IN A DESIRED CONFIGURATION AND ANCHORED THERETO A SMOOTH, TOUGH, PINHOLE-FREE SURFACE LAYER OF A THERMOPLASTIC POLYHYDROXY ETHER REACTION PRODUCT OF ABOUT 0.985 TO ABOUT 1.015 MOLES OF AN EPOXIDE, PER MOLE OF DIHYDRIC PHENOL, CHARACTERIZED BY HAVING ESSENTIALLY NO 1,2-EPOXY GROUPS, A DEGREE OF POLYMERIZATION OF AT LEAST 30, AND A REDUCED VISCOSITY MEASURED AT 25* AS A 0.2 GRAM SAMPLE IN 100 MILLILITERS OF TETRAHYDROFURAN OF AT LEAST ABOUT 0.5.
References Cited (Backward Citations)
US2592560A
Cited
GB764330A
Cited
US2801989A
Cited
US2806016A
Cited
US2875117A
Cited
US2830721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |