US3218372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding material and molded articles
Assignee: Kunoshima Kagaku Kogyo KK
•
Filing: 1961-08-21
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Granted: 1965-11-16
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Michihiko Okamura
- 👤 Mikio Matsukane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:32
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/183; C08G63/64; C08G64/00; C08G64/04; C08G64/06; C08G64/20; C08G64/22; C08G64/24; C08G64/30; C08G64/307; C08L69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A POLYMER COMPOSITION TO BE USED FOR MOLDING PURPOSES COMPRISING SUBSTANTIALLY 95-5% BY WEIGHT OF A POLYCARBONATE WHICH IS THE PRODUCT OF CONDENSING AT LEAST ONE 4,4''-DIHYDROXY-DI(MONONUCLEAR ARYL)-ALKANE WITH A CARBONIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF PHOSGENE AND CARBONIC ACID DIESTER AND 5-95% BY WEIGHT OF A POLYALKYLENE TEREPHTHALATE, SAID POLYCARBONATE HAVING AN INTRINSIC VISCOSITY OF 0.46-1.2 (THE UNIT OF CONCENTRATION BEING GRAM/100 CC.) BASED ON A VALUE MEASURED AT 20*C. WITH METHYLENE CHLORIDE AS THE SOLVENT AND SAID POLYALKYLENE TEREPHTHALATE HAVING AN INTRINSIC VISCOSITY OF 0.5-0.85 (THE UNIT OF CONCENTRATION BEING GRAM/ 100 CC.) BASED ON A VALUE MEASURED AT 25*C. WITH THE SOLVENT BEING A MIXED SOLVENT OF PHENOL AND TETRACHLOROETHANE IN A PROPORTION OF 60 PARTS BY WEIGHT OF THE FORMER TO 40 PARTS BY WEIGHT OF THE LATTER.
Claim 2
Dependent Claim
135 words
A POLYMER COMPOSITION TO BE USED FOR MOLDING PURPOSES COMPRISING SUBSTANTIALLY 95-5% BY WEIGHT OF A POLYCARBONATE WHICH IS THE PRODUCT OF CONDENSING AT LEAST ONE 4,4''-DIHYDROXY-DI(MONONUCLEAR ARYL)-ALKANE WITH A CARBONIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF PHOSGENE AND CARBONIC ACID DIESTER AND 5-95% BY WEIGHT OF A POLYALKYLENE TEREPHTHALATE, SAID POLYCARBONATE HAVING AN INTRINSIC VISCOSITY OF 0.46-1.2 (THE UNIT OF CONCENTRATION BEING GRAM/100 CC.) BASED ON A VALUE MEASURED AT 20*C. WITH METHYLENE CHLORIDE AS THE SOLVENT AND SAID POLYALKYLENE TEREPHTHALATE HAVING AN INTRINSIC VISCOSITY OF 0.5-0.85 (THE UNIT OF CONCENTRATION BEING GRAM/ 100 CC.) BASED ON A VALUE MEASURED AT 25*C. WITH THE SOLVENT BEING A MIXED SOLVENT OF PHENOL AND TETRACHLOROETHANE IN A PROPORTION OF 60 PARTS BY WEIGHT OF THE FORMER TO 40 PARTS BY WEIGHT OF THE LATTER.
References Cited (Backward Citations)
US2789971A
Cited
US3000849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |