Patent US3635902A successfully refreshed from Google Patents.
US3635902A
Expired / Lapsed
US
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Products
Assignee: EIDP Inc
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Filing: 1969-12-29
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Granted: 1972-01-18
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Expires: 1989-12-29
Abstract
Abstract THE APPLICATION DISCLOSES A CLASS OF GLYCOLS CANTIANING TWO HYDROCYCYCLOHEXYL GROUPS, AND LINEAR CONDENSATION POLYESTERS PREPARED THEREFROM WHICH ARE CHARACTERIZED BY RECURRING UNITS OF THE FORMULA -O-CH2-Q-(R)M-Q''-CH2-OOC-(A)-CO- WHEREIN M IS 0 OR 1, Q AND Q'' ARE 1.3.-OR 1.4-CYCLOHEXLENE OR ALKYL DERIVATIVES THEREOF, R IS AN ALKYLENE RADICAL, AND A IS A DIVALENT SATURATED HYDROCARBON RADIACAL CONTAINING A 6-MEMBERED CARBOCYLIC NUCLEI. POLYESTERS PARTICULARLY SUITALBLE FOR TEXTILE FIBERS ARE ILLUSTRATED.
Inventors
- 👤 Robert G Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:38
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |