US3166606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate resins having improved flow properties
Assignee: Union Carbide Corp
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Filing: 1960-12-28
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Granted: 1965-01-19
•
Expires: 1980-12-28
Abstract
No abstract record available.
Inventors
- 👤 Norman H Reinking
- 👤 Wynstra John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:41
CPC Classifications
C; C08; C08L; C08L69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A POLYCARBONATE RESIN COMPOSITION POSSESSING IMPROVED EXTRUDABILITY WHICH COMPRISES A BLEND OF FROM 10 TO 90 PERCENT BY WEIGHT BASED ON THE TOTAL POLYCARBONATE RESIN CONTENT OF A HIGH MOLECULAR WEIGHT POLYCARBONATE RESIN COMPRISING RECURRING CARBONATE GROUPS LINKING RESIDUES OF AT LEAST ONE DIHYDRIC PHENOL HAVING A REDUCED VISCOSITY VALUE OF AT LEAST 0.6 AND A COMPLEMENTARY AMOUNT OF FROM 90 TO 10 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL RESIN CONTENT OF A LOW MOLECULAR WEIGHT POLYCARBONATE COMPRISING RECURRING CARBONATE GROUPS LINKING RESIDUES OF AT LEAST ONE DIHYDRIC PHENOL HAVING A REDUCED VISCOSITY VALUE OF NOT GREATER THAN 0.5 WITH THE PROVISO THAT THE DIFFERENCE IN REDUCED VISCOSITY VALUES OF THE TWO RESIN MASSES BE NOT LESS THAN ABOUT 0.2, AND WITH THE FURTHER PROVISO THAT THE SAID BLEND HAS A REDUCED VISCOSITY VALUE WITHIN THE RANGE OF ABOUT 0.4 TO ABOUT 0.8.
Claim 2
Dependent Claim
147 words
A POLYCARBONATE RESIN COMPOSITION POSSESSING IMPROVED EXTRUDABILITY WHICH COMPRISES A BLEND OF FROM 10 TO 90 PERCENT BY WEIGHT BASED ON THE TOTAL POLYCARBONATE RESIN CONTENT OF A HIGH MOLECULAR WEIGHT POLYCARBONATE RESIN COMPRISING RECURRING CARBONATE GROUPS LINKING RESIDUES OF AT LEAST ONE DIHYDRIC PHENOL HAVING A REDUCED VISCOSITY VALUE OF AT LEAST 0.6 AND A COMPLEMENTARY AMOUNT OF FROM 90 TO 10 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL RESIN CONTENT OF A LOW MOLECULAR WEIGHT POLYCARBONATE COMPRISING RECURRING CARBONATE GROUPS LINKING RESIDUES OF AT LEAST ONE DIHYDRIC PHENOL HAVING A REDUCED VISCOSITY VALUE OF NOT GREATER THAN 0.5 WITH THE PROVISO THAT THE DIFFERENCE IN REDUCED VISCOSITY VALUES OF THE TWO RESIN MASSES BE NOT LESS THAN ABOUT 0.2, AND WITH THE FURTHER PROVISO THAT THE SAID BLEND HAS A REDUCED VISCOSITY VALUE WITHIN THE RANGE OF ABOUT 0.4 TO ABOUT 0.8.
References Cited (Backward Citations)
US2789965A
Cited
US2789971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |