US3383343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric polyesters derived from glycols, dimerized fatty acids and aromatic dicarboxylic acids
Assignee: British Nylon Spinners Ltd
•
Filing: 1964-05-15
•
Granted: 1968-05-14
•
Expires: 1984-05-15
Abstract
No abstract record available.
Inventors
- 👤 Mohajer Ali Akbar
- 👤 Thomas Peter Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:26
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/16; C08G63/20; D; D01; D01F; D01F6/00; D01F6/78; D01F6/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A COPOLYESTER HAVING AN INTRINISIC VISOCITY OF AT LEAST 0.5 OF A POLYMETHYLENE GLYCOL CONTAINING FROM TWO TO SIX CARBON ATOMS, A DIMERIC FATTY ACID AND AN AROMATIC DICARBOXYLIC ACID COMPRISING NOT MORE THAN TWO BENZENE RINGS WHEREIN THE TWO CARBOXYL GROUPS DO NOT OCCUPY PERI OR OTHO POSITIONS, THE AFORESAID DIMERIC FATTY ACID CONSTITUTING FROM 55% TO 65% BY WEIGHT OF THE TOTAL DIMERIC FATTY AND AROMATIC ACIDS.
Claim 2
Dependent Claim
69 words
A COPOLYESTER HAVING AN INTRINISIC VISOCITY OF AT LEAST 0.5 OF A POLYMETHYLENE GLYCOL CONTAINING FROM TWO TO SIX CARBON ATOMS, A DIMERIC FATTY ACID AND AN AROMATIC DICARBOXYLIC ACID COMPRISING NOT MORE THAN TWO BENZENE RINGS WHEREIN THE TWO CARBOXYL GROUPS DO NOT OCCUPY PERI OR OTHO POSITIONS, THE AFORESAID DIMERIC FATTY ACID CONSTITUTING FROM 55% TO 65% BY WEIGHT OF THE TOTAL DIMERIC FATTY AND AROMATIC ACIDS.
References Cited (Backward Citations)
US1799420A
Cited
US2111427A
Cited
US2429219A
Cited
GB862583A
Cited
US3057824A
Cited
US3158584A
Cited
US3311578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |