Patent US3380949A successfully refreshed from Google Patents.
US3380949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of shaped synthetic polymer articles
Assignee: Standard Oil Co
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Filing: 1965-06-23
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Granted: 1968-04-30
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Expires: 1985-06-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Isley
- 👤 Kenneth E Blower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
THE PROCESS FOR PREPARING A THERMOFORMABLE POLYMER/SOLVENT DRY PARTICULATE BLEND COMPRISING INTIMATELY MIXING FROM 45 TO 80% BY WEIGHT OF A PARTICULATE, RESINOUS ACRYLONITRILE POLYMER COMPOSED OF 90% BY WEIGHT OR MORE OF POLYMERIZED ACRYLONITRILE AND FROM 55 TO 20% BY WEIGHT OF A SOLVENT FOR SAID ACRYLONITRILE POLYMER, SAID ACRYLONITRILE POLYMER HAVING A SURFACE AREA OF AT LEAST ABOUT 10 SQUARE METERS PER GRAM.
Claim 2
Dependent Claim
65 words
THE PROCESS FOR PREPARING A THERMOFORMABLE POLYMER/SOLVENT DRY PARTICULATE BLEND COMPRISING INTIMATELY MIXING FROM 45 TO 80% BY WEIGHT OF A PARTICULATE, RESINOUS ACRYLONITRILE POLYMER COMPOSED OF 90% BY WEIGHT OR MORE OF POLYMERIZED ACRYLONITRILE AND FROM 55 TO 20% BY WEIGHT OF A SOLVENT FOR SAID ACRYLONITRILE POLYMER, SAID ACRYLONITRILE POLYMER HAVING A SURFACE AREA OF AT LEAST ABOUT 10 SQUARE METERS PER GRAM.
References Cited (Backward Citations)
US2540475A
Cited
US2559172A
Cited
US2706674A
Cited
US2971937A
Cited
US2878228A
Cited
US3202641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |