US2506014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl acetal compositions
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-09-04
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Granted: 1950-05-02
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Expires: 1968-09-04
Abstract
No abstract record available.
Inventors
- 👤 Curtis Francis Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/02; C08K5/03; C08L; C08L29/00; C08L29/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A POLYVINYL ACETAL RESIN AND A STILL RESIDUE OBTAINED AS A BY-PRODUCT IN THE PROCESS WHICH INCLUDES THE STEPS OF HEATING A COMPOUND TAKEN FROM THE GROUP CONSISTING OF BENZENE AND MIXTURES THEREOF WITH TOLUENE AND XYLENE TO TEMPERATURES AT WHICH DIPHENYLS AND TERPHENYLS ARE FORMED, DISTILLING THE PRODUCT TO REMOVE UNCONVERTED MATERIALS THAT BOIL BELOW 200*C., CHLORINATING THE RESULTANT RESIDUE AND DISTILLING THE CHLORINATED MIXTURE AT 250 TO 420*C. TO REMOVE THEREFROM PURE CHLORINATED DIPHENYLS AND CHLORINATED TERPHENYLS, SAID STILL RESIDUE CONSISTING ESSENTIALLY OF CHLORINATED POLYPHENYL COMPOUNDS TAKEN FROM THE GROUP CONSISTING OF CHLORINATED TRI-ORTHO-PHENYLENE AND CHLORINATED DIPHENYL BENZENE POLYMERS, SAID RESIDUE HAVING A MELTING POINT OF FROM 50 TO 250*C. AND A CHLORINE CONTENT OF 50 TO 60%, SAID COMPOSITION CONTAINING UP TO 100 PARTS OF STILL RESIDUE PER 100 PARTS OF POLYVINYL ACETAL RESIN.
Claim 2
Dependent Claim
144 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF A POLYVINYL ACETAL RESIN AND A STILL RESIDUE OBTAINED AS A BY-PRODUCT IN THE PROCESS WHICH INCLUDES THE STEPS OF HEATING A COMPOUND TAKEN FROM THE GROUP CONSISTING OF BENZENE AND MIXTURES THEREOF WITH TOLUENE AND XYLENE TO TEMPERATURES AT WHICH DIPHENYLS AND TERPHENYLS ARE FORMED, DISTILLING THE PRODUCT TO REMOVE UNCONVERTED MATERIALS THAT BOIL BELOW 200*C., CHLORINATING THE RESULTANT RESIDUE AND DISTILLING THE CHLORINATED MIXTURE AT 250 TO 420*C. TO REMOVE THEREFROM PURE CHLORINATED DIPHENYLS AND CHLORINATED TERPHENYLS, SAID STILL RESIDUE CONSISTING ESSENTIALLY OF CHLORINATED POLYPHENYL COMPOUNDS TAKEN FROM THE GROUP CONSISTING OF CHLORINATED TRI-ORTHO-PHENYLENE AND CHLORINATED DIPHENYL BENZENE POLYMERS, SAID RESIDUE HAVING A MELTING POINT OF FROM 50 TO 250*C. AND A CHLORINE CONTENT OF 50 TO 60%, SAID COMPOSITION CONTAINING UP TO 100 PARTS OF STILL RESIDUE PER 100 PARTS OF POLYVINYL ACETAL RESIN.
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) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |