US2535643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing vinyl resin plasticized sheets
Assignee: Advance Solvents and Chemical Corp
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Filing: 1947-07-22
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Granted: 1950-12-26
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Expires: 1967-07-22
Abstract
No abstract record available.
Inventors
- 👤 Gerry P Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
A PROCESS FOR PREPARING A CLEAR, RESILIENT, SELF-SUSTAINING COMPOSITION OF MATTER WHICH COMPRISES MILLING AND CALEDERING AT A TEMPERATURE, OF ABOUT 300*F. 1 PART OF A VINYL CHLORIDE-VINYL ACETATE COPOLYMER WITH 1/4 TO 5 PARTS OF A PLASTICIZER WHICH IS PER SE COMPATIBLE WITH AND A SOLVENT FOR SAID RESIN, SAID PLASTICIZER BEING A MIXED PHTHALATE ESTER PREPARED BY REACTING 1 MOL OF PHTHALIC ANHYDRIDE WITH 1-1.2 MOLS OF A HYDROAROMATIC ALCOHOL AND 0.8-1 MOL OF AN ALIPHATIC ALCOHOL HAVING 4-12 CARBON ATOMS.
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) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |