Patent US2935487A successfully refreshed from Google Patents.
US2935487A
Expired / Lapsed
US
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Polyester-polyisocyanate insulating materials
Assignee: General Electric Co
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Filing: 1956-05-31
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Granted: 1960-05-03
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Expires: 1976-05-31
Abstract
No abstract record available.
Inventors
- 👤 Daniel W Fox
- 👤 Algerd F Zavist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:32
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/302; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4219; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; H01B3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A COMPOSITION OF MATTER COMPRISING (1) ONE EQUIVALENT OF A COMPOSITION CONSISTING ESSENTIALLY OF THE RESINOUS REACTION PRODUCT OF (A) FROM ABOUT 25 TO 56 EQUIVALENT PERCENT OF A LOWER DIALKYL ESTER OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF ISOPHTHALIC ACID AND TEREPHTHALIC ACID AND MIXTURES THEREOF, (B) FROM ABOUT 15 TO 46 EQUIVALENT PERCENT OF ETHYLENE GLYCOL, AND (C) 13 TO 44 PERCENT OF A SATURATED ALIPHATIC POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXYL GROUPS, AND (2) AT LEAST ABOUT TWO EQUIVALENTS OF AN ORGANIC POLYISOCYANATE SAID EQUIVALENT OF POLYISOCYANATE BEING EQUAL TO THE NUMBER OF MOLES OF POLYISOCYANATE MULTIPLIED BY THE NUMBER OF ISOCYANATE GROUPS IN SAID POLYISOCYANATE.
Claim 2
Dependent Claim
112 words
A COMPOSITION OF MATTER COMPRISING (1) ONE EQUIVALENT OF A COMPOSITION CONSISTING ESSENTIALLY OF THE RESINOUS REACTION PRODUCT OF (A) FROM ABOUT 25 TO 56 EQUIVALENT PERCENT OF A LOWER DIALKYL ESTER OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF ISOPHTHALIC ACID AND TEREPHTHALIC ACID AND MIXTURES THEREOF, (B) FROM ABOUT 15 TO 46 EQUIVALENT PERCENT OF ETHYLENE GLYCOL, AND (C) 13 TO 44 PERCENT OF A SATURATED ALIPHATIC POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXYL GROUPS, AND (2) AT LEAST ABOUT TWO EQUIVALENTS OF AN ORGANIC POLYISOCYANATE SAID EQUIVALENT OF POLYISOCYANATE BEING EQUAL TO THE NUMBER OF MOLES OF POLYISOCYANATE MULTIPLIED BY THE NUMBER OF ISOCYANATE GROUPS IN SAID POLYISOCYANATE.
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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |