Patent US2830975A successfully refreshed from Google Patents.
US2830975A
Expired / Lapsed
US
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Copolymerization of a vinylpyridine and a conjugated diene
Assignee: Phillips Petroleum Co
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Filing: 1955-10-17
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Granted: 1958-04-15
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Howard B Irvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:07
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/14; C08F6/22; C08F36/00; C08F36/02; C08F36/04; C08F6/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A PROCESS FOR RECOVERING VINYLPYRIDINE FROM A LATEX COMPRISING A COPOLYMER OF A VINYLPYRIDINE AND A CONJUGATED DIENE, COMPRISING ADDING AN ACID COAGULANT TO SAID LATEX SO AS TO COAGULATE SAID COPOLYMER; SEPARATING COAGULATED COPOLYMER FROM THE RESULTING SERUM; WASHING THE SEPARATED COPOLYMER WITH A DILUTE AQUEOUS ALKALI; WASHING THE ALKALI-WASHED COPOLYMER WITH WATER; COMBINING THE ALKALI WASH AND WATER WASH FROM THE WASHING STEPS WITH SAID SERUM AND RENDERING SAME BASIC; AND RECOVERING VINYLPYRIDINE FROM THE RESULTING ALKALINE MIXTURE.
Claim 2
Dependent Claim
80 words
A PROCESS FOR RECOVERING VINYLPYRIDINE FROM A LATEX COMPRISING A COPOLYMER OF A VINYLPYRIDINE AND A CONJUGATED DIENE, COMPRISING ADDING AN ACID COAGULANT TO SAID LATEX SO AS TO COAGULATE SAID COPOLYMER; SEPARATING COAGULATED COPOLYMER FROM THE RESULTING SERUM; WASHING THE SEPARATED COPOLYMER WITH A DILUTE AQUEOUS ALKALI; WASHING THE ALKALI-WASHED COPOLYMER WITH WATER; COMBINING THE ALKALI WASH AND WATER WASH FROM THE WASHING STEPS WITH SAID SERUM AND RENDERING SAME BASIC; AND RECOVERING VINYLPYRIDINE FROM THE RESULTING ALKALINE MIXTURE.
Claim 3
Dependent Claim
54 words
A PROCESS FOR POLYMERIZING A VINYLPYRIDINE WITH A CONJUGATED DIENE WHICH COMPRISES PREPARING AN AQUEOUS EMULSION POLYMERIZATION RECIPE AND EFFECTING COPOLYMERIZATION OF SAID VINYLPYRIDINE AND SAID DIENE TO FORM A LATEX CONTAINING UNREACTED MONOMERS; ADDING AN ACID COAGULANT TO SAID LATEX SO AS TO COAGULATE SAID COPOLYMER; SEPARATING COAGULATED COPOLYMER FROM THE RESULTING SERUM;
Claim 4
Dependent Claim
54 words
A PROCESS FOR POLYMERIZING A VINYLPYRIDINE WITH A CONJUGATED DIENE WHICH COMPRISES PREPARING AN AQUEOUS EMULSION POLYMERIZATION RECIPE AND EFFECTING COPOLYMERIZATION OF SAID VINYLPYRIDINE AND SAID DIENE TO FORM A LATEX CONTAINING UNREACTED MONOMERS; ADDING AN ACID COAGULANT TO SAID LATEX SO AS TO COAGULATE SAID COPOLYMER; SEPARATING COAGULATED COPOLYMER FROM THE RESULTING SERUM;
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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |