US3340212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical insulating resin composition of epoxy resin, acid-terminated polyester and stannous octoate
Assignee: 3M Co
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Filing: 1961-11-09
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Granted: 1967-09-05
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Expires: 1981-11-09
Abstract
No abstract record available.
Inventors
- 👤 Jun Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:39
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/681; C08G59/685; C08L; C08L63/00; C08L67/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A HEAT-CURABLE EPOXY RESIN COMPOSITION WHICH PROVIDES CURED PRODUCTS HAVING EXCELLENT ELECTRICAL INSULATING VALUES OVER A WIDE RANGE OF TEMPERATURES, WHICH VALUES REMAIN EFFECTIVELY HIGH AFTER LONG EXPOSURE AT HIGH TEMPERATURES, SAID COMPOSITION COMPRISING A MIXTURE OF (1) AN ACID-TERMINATED POLYESTER OF POLYCARBOXYLIC ACID AND POLYHYDROXY ALCOHOL, WHICH POLYESTER CONTAINS A CALCULATED AVERAGE OF 2.0 TO 3.0 CARBOXYL GROUPS PER MOLECULE AND HAS AN ACID NUMBER OF 15-125 AND A HYDROXYL NUMBER OF LESS THAN 10, (2) AN EPOXY RESIN CONTAINING AT LEAST 1.3 OXIRANE GROUPS PER AVERAGE MOLECULAR WEIGHT, AND (3) AT LEAST 0.2 PART, PER 100 PARTS OF POLYESTER, OF STANNOUS OCTOATE, SAID MIXTURE CONTAINING ABOUT 0.5 TO 2 EPOXY GROUPS OF EPOXY RESIN PER CARBOXYL GROUP OF POLYESTER.
Claim 2
Dependent Claim
121 words
A HEAT-CURABLE EPOXY RESIN COMPOSITION WHICH PROVIDES CURED PRODUCTS HAVING EXCELLENT ELECTRICAL INSULATING VALUES OVER A WIDE RANGE OF TEMPERATURES, WHICH VALUES REMAIN EFFECTIVELY HIGH AFTER LONG EXPOSURE AT HIGH TEMPERATURES, SAID COMPOSITION COMPRISING A MIXTURE OF (1) AN ACID-TERMINATED POLYESTER OF POLYCARBOXYLIC ACID AND POLYHYDROXY ALCOHOL, WHICH POLYESTER CONTAINS A CALCULATED AVERAGE OF 2.0 TO 3.0 CARBOXYL GROUPS PER MOLECULE AND HAS AN ACID NUMBER OF 15-125 AND A HYDROXYL NUMBER OF LESS THAN 10, (2) AN EPOXY RESIN CONTAINING AT LEAST 1.3 OXIRANE GROUPS PER AVERAGE MOLECULAR WEIGHT, AND (3) AT LEAST 0.2 PART, PER 100 PARTS OF POLYESTER, OF STANNOUS OCTOATE, SAID MIXTURE CONTAINING ABOUT 0.5 TO 2 EPOXY GROUPS OF EPOXY RESIN PER CARBOXYL GROUP OF POLYESTER.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |