Patent US2515801A successfully refreshed from Google Patents.
US2515801A
Expired / Lapsed
US
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Plastics molding compositions
Assignee: RCA Corp
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Filing: 1946-08-06
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Granted: 1950-07-18
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Expires: 1966-08-06
Abstract
No abstract record available.
Inventors
- 👤 Edward M Sadowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:28
CPC Classifications
C; C08; C08L; C08L31/00; C08L31/02; C08L31/04; C08L93/00; C08L93/04; C08L1/00; C08L1/08; C08L1/26; C08L1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A MOULDING COMPOSITION SUITABLE FOR MAKING PHONOGRAPH RECORDS COMPRISING 3-10 PERCENT ETHYL CELLULOSE, 1-10 PERCENT POLYVINYL ACETATE, 15-24 PERCENT OF A THERMOPLASTIC RESINOUS MATERIAL HAVING A SOFTENING POINT OF BETWEEN 75* AND 170*C. WHICH IS HIGHLY FLUID WHEN MOLTEN, 0.5-3 PERCENT OF A PLASTICIZER FOR SAID ETHYL CELLULOSE AND SAID POLYVINYL ACETATE, AND 60-75 PERCENT OF A FILLER.
Claim 2
Dependent Claim
58 words
A MOULDING COMPOSITION SUITABLE FOR MAKING PHONOGRAPH RECORDS COMPRISING 3-10 PERCENT ETHYL CELLULOSE, 1-10 PERCENT POLYVINYL ACETATE, 15-24 PERCENT OF A THERMOPLASTIC RESINOUS MATERIAL HAVING A SOFTENING POINT OF BETWEEN 75* AND 170*C. WHICH IS HIGHLY FLUID WHEN MOLTEN, 0.5-3 PERCENT OF A PLASTICIZER FOR SAID ETHYL CELLULOSE AND SAID POLYVINYL ACETATE, AND 60-75 PERCENT OF A FILLER.
References Cited (Backward Citations)
GB308658A
Cited
GB345521A
Cited
GB404279A
Cited
US2114393A
Cited
US2313186A
Cited
US2327862A
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US2388613A
Cited
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Cited
US2446578A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |