US3036991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters from hydroquinone
Assignee: —
•
Filing: —
•
Granted: 1962-05-29
•
Expires: 1979-05-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G63/18; C08G63/19; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/422; H01B3/423; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A LINEAR SUPERPOLYESTER OF P-PHENYLENE ISOPHTHALATE UNITS INTERSPERED WITH P-P''-BIPHEHYLENE ISOPHTHALATE UNITS, HTHE INTRINSIC VISCOSITY OF SAID SUPERPOLYESTER BEING AT LEAST 0.5 AND THE P-PHENYLENE ISOPHTHALATE UNITS BEING AT LEAST 40 MOLE PERCENT OF THE TOTAL P-PHENYLENE ISOPHTHALATE AND P,P''-BIPHENYLENE ISOPHSTHALATE UNITS IN SAID SUPERPOLYESTER.
Claim 2
Dependent Claim
45 words
A LINEAR SUPERPOLYESTER OF P-PHENYLENE ISOPHTHALATE UNITS INTERSPERED WITH P-P''-BIPHEHYLENE ISOPHTHALATE UNITS, HTHE INTRINSIC VISCOSITY OF SAID SUPERPOLYESTER BEING AT LEAST 0.5 AND THE P-PHENYLENE ISOPHTHALATE UNITS BEING AT LEAST 40 MOLE PERCENT OF THE TOTAL P-PHENYLENE ISOPHTHALATE AND P,P''-BIPHENYLENE ISOPHSTHALATE UNITS IN SAID SUPERPOLYESTER.
References Cited (Backward Citations)
US2595343A
Cited
US2954355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |