Patent US2616879A successfully refreshed from Google Patents.
US2616879A
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Production of polymerized vinyl alkyl ethers
Assignee: GAF Chemicals Corp
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Filing: 1946-07-02
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Granted: 1952-11-04
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Expires: 1966-07-02
Abstract
No abstract record available.
Inventors
- 👤 Zoss Abraham Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:14
CPC Classifications
C; C08; C08F; C08F16/00; C08F16/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A PROCESS OF PREPARING POLYMERIC VINYL ALKYL ETHERS WHEREIN THE VINYL ALKYL ETHER IS POLYMERIZED IN THE PRESENCE OF A LIQUID ORGANIC DILUENT AND A SMALL AMOUNT OF NA BORON FLUORIDE COMPOUND, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION AT A TEMPERATURE IN THE RANGE -70* C. TO 30* C. IN THE PRESENCE OF A LIQUID ORGANIC DILUENT COMPRISING ESSENTIALLY A HYDROGEN-CONTAINING HALOGENATED ALKANE.
Claim 2
Dependent Claim
65 words
IN A PROCESS OF PREPARING POLYMERIC VINYL ALKYL ETHERS WHEREIN THE VINYL ALKYL ETHER IS POLYMERIZED IN THE PRESENCE OF A LIQUID ORGANIC DILUENT AND A SMALL AMOUNT OF NA BORON FLUORIDE COMPOUND, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE POLYMERIZATION AT A TEMPERATURE IN THE RANGE -70* C. TO 30* C. IN THE PRESENCE OF A LIQUID ORGANIC DILUENT COMPRISING ESSENTIALLY A HYDROGEN-CONTAINING HALOGENATED ALKANE.
References Cited (Backward Citations)
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US2061934A
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US2108994A
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US2243658A
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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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |