US2886552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization employing polyvinyl alkyl ethers as suspension stabilizers
Assignee: Diamond Shamrock Corp
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Filing: 1954-06-10
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Granted: 1959-05-12
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Expires: 1974-06-10
Abstract
No abstract record available.
Inventors
- 👤 Heiligmann Randall George
- 👤 Robert I Leininger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:55
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE PROCESS OF PRODUCING A HIGH-QUALITY POLYMER, SAID PROCESS COMPRISING SUSPENDING A VOLATILE ALIPHATIC POLYMERIZABLE MONOETHYLENIC MONOMER IN A LIQUID CONSISTING OF WATER WITH THE AID OF ABOUT 0.025 TO 1.0% BY MONOMER WEIGHT OF A LINEAR POLYVINYL ALKYL ETHER AS A SOLE DISPERSANT, POLYMERIZING SAID MONOMER WHILE SO SUSPENDED WITH THE AID OF HEAT AND A POLYMERIZATION CATALYST AND SEPARATING SAID POLYVINYL ALKYL ETHER AND THE RESULTANT POLYMER BY DISCONTINUING AGITATION.
Claim 2
Dependent Claim
72 words
THE PROCESS OF PRODUCING A HIGH-QUALITY POLYMER, SAID PROCESS COMPRISING SUSPENDING A VOLATILE ALIPHATIC POLYMERIZABLE MONOETHYLENIC MONOMER IN A LIQUID CONSISTING OF WATER WITH THE AID OF ABOUT 0.025 TO 1.0% BY MONOMER WEIGHT OF A LINEAR POLYVINYL ALKYL ETHER AS A SOLE DISPERSANT, POLYMERIZING SAID MONOMER WHILE SO SUSPENDED WITH THE AID OF HEAT AND A POLYMERIZATION CATALYST AND SEPARATING SAID POLYVINYL ALKYL ETHER AND THE RESULTANT POLYMER BY DISCONTINUING AGITATION.
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |