US3557055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester-ethers
Assignee: Rhodiaceta SA
•
Filing: 1967-07-31
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Granted: 1971-01-19
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Expires: 1987-07-31
Abstract
Abstract POLYESTERS SUITABLE FOR USE IN TEXTILE FIBRES AND FILMS AND OF BEING DYED WTH PLASTOSOLUBLE DYES COMPRISE MAINLY ETHYLENE (OR OTHER ALKYLENE) TEREPHTHALATE STRUCTURAL UNITES, BUT ALSO 5-35% OF STRUCTURAL UNITS DERIVED FROM TEREPHTHALIC ACID AND CERTAIN A-W-DIHYDROXY AROMATIC ETHERS, NAMELY THOSE OF FORMULA: HO.R3.OAR-(-OR2-OAR-)NOR3OH IN WHICH R2 AND R3 ARE DIVALENT HYDORCARBON RADICALS, OF WHICH R2 MAY CONTAIN AN ETHER LINKAGE, AR IS A DIVALENT AROMATIC RADICAL, USUALLY PHENYLENE, AND N IS 4 OR MORE.
Inventors
- 👤 Lucien Bonnard
- 👤 Rene Pich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:06
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08G75/00; C08G75/20; C08G75/23; C08L; C08L71/00; C08L2205/00; C08L2205/05; C08L77/00; C08L77/04; C08L77/06
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |