Patent US3326864A successfully refreshed from Google Patents.
US3326864A
Expired / Lapsed
US
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Thermoset resin compositions
Assignee: Dow Chemical Co
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Filing: 1964-02-05
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Granted: 1967-06-20
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Expires: 1984-02-05
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Moore
- 👤 Robert L Zimmerman
- 👤 Dale M Pickelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:25
CPC Classifications
C; C09; C09D; C09D135/00; C09D135/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
COMPOSITION CONSISTING OF A HOMOGENEOUS COPOLYMER OF A MONOVINYLIDENE AROMATIC COMPOUND, AN A,B-UNSATURATED CYCLIC ANHYDRIDE, THE CYCLIC ANHYDRIDE CONTENT OF AT LEAST 90 WEIGHT PERCENT OF THE POLYMER BEING WITHIN A RANGE OF 5 WEIGHT PERCENT AS DETERMINED BY FRACTIONAL PRECIPITATION ANALYSIS, AND A POLYMERIC AROMATIC HYDROXYLCONTAINING CURING AGENT WHICH CONTAINS FROM 1.4 TO 38.8 WEIGHT PERCENT HYDROXYL GROUPS, THE RATIO OF HYDROXYL TO ANHYDRIDE GROUPS BEING FROM 0.1 TO 5.0.
Claim 2
Dependent Claim
71 words
COMPOSITION CONSISTING OF A HOMOGENEOUS COPOLYMER OF A MONOVINYLIDENE AROMATIC COMPOUND, AN A,B-UNSATURATED CYCLIC ANHYDRIDE, THE CYCLIC ANHYDRIDE CONTENT OF AT LEAST 90 WEIGHT PERCENT OF THE POLYMER BEING WITHIN A RANGE OF 5 WEIGHT PERCENT AS DETERMINED BY FRACTIONAL PRECIPITATION ANALYSIS, AND A POLYMERIC AROMATIC HYDROXYLCONTAINING CURING AGENT WHICH CONTAINS FROM 1.4 TO 38.8 WEIGHT PERCENT HYDROXYL GROUPS, THE RATIO OF HYDROXYL TO ANHYDRIDE GROUPS BEING FROM 0.1 TO 5.0.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |