Patent US3036990A successfully refreshed from Google Patents.
US3036990A
Expired / Lapsed
US
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Wholly aromatic polyesters from hydroquinone, isophthalic and terephthalic acid reactants
Assignee: General Electric Co
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Filing: 1960-06-01
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Granted: 1962-05-29
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Expires: 1980-06-01
Abstract
No abstract record available.
Inventors
- 👤 Simon W Kantor
- 👤 Fred F Holub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:41
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; C08G63/191; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; H01B; H01B3/00; H01B3/02; H01B3/04; H01B3/18; H01B3/30; H01B3/42; H01B3/421; H01B3/422; H01B3/423; H05; H05B; H05B33/00; H05B33/12; H05B33/20; H05B33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A LINEAR, SUPERPOLYESTER OF P-PHENYLENE ISOPHTHALATE UNITS INTERPERSED WITH P-PHENYLENE TEREPHALATE UNITS, THE INTRINSIC VISCOSITY OF SAID SUPERPOLYESTERS BEING AT LEAST 0.5 AND THE ISOPHTHALATE CONTENT BEING AT LEAST 60 MOLE PERCENT OF THE TOTAL OF THE ISOPHTHALATE AND TEREPHTHALATE CONTENT OF SAID SUPERPOLYESTER, SAID SUPERPOLYESTER HAVING THE REPEATING STRUCTURAL UNIT
Claim 2
Dependent Claim
51 words
A LINEAR, SUPERPOLYESTER OF P-PHENYLENE ISOPHTHALATE UNITS INTERPERSED WITH P-PHENYLENE TEREPHALATE UNITS, THE INTRINSIC VISCOSITY OF SAID SUPERPOLYESTERS BEING AT LEAST 0.5 AND THE ISOPHTHALATE CONTENT BEING AT LEAST 60 MOLE PERCENT OF THE TOTAL OF THE ISOPHTHALATE AND TEREPHTHALATE CONTENT OF SAID SUPERPOLYESTER, SAID SUPERPOLYESTER HAVING THE REPEATING STRUCTURAL UNIT
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) | 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 |