Patent US2996490A successfully refreshed from Google Patents.
US2996490A
Expired / Lapsed
US
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Suspension polymerization process and novel compounds for use in said process
Assignee: Occidental Chemical Corp
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Filing: 1959-05-12
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Granted: 1961-08-15
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Expires: 1979-05-12
Abstract
No abstract record available.
Inventors
- 👤 George P Rowland
- 👤 John J Wolski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:32
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
PROCESS FOR POLYMERIZING A MONOMERIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND MIXTURES THEREOF WITH UP TO 20%, BASED ON THE WEIGHT OF THE MIXTURES, OF OTHER ETHYLENICALLY UNSATURATED COMPOUNDS COPOLYMERIZABLE THEREWITH WHICH COMPRISES SUSPENDING, AGITATING AND POLYMERIZING SAID MONOMERIC SUBSTANCE IN A REACTION MASS COMPRISING AN AQUEOUS SOLUTION OF A PROTECTIVE COLLOID, A PEROXIDE CATALYST SOLUBLE IN SAID MONOMERIC SUBSTANCE AND AT LEAST 0.05%, BASED ON THE WEIGHT OF SAID MONOMERIC SUBSTANCE, OF A SALT SELECTED FROM THE CLASS CONSISTING OF THE BARIUM, STRONTIUM, CALCIUM, TIN AND ZINC NEUTRAL SALTS OF ALKYL BETAIMINO DIPROPIONIC ACIDS IN WHICH THE ALKYL GROUPS CONTAIN FROM 8 TO 16 CARBON ATOMS.
Claim 2
Dependent Claim
111 words
PROCESS FOR POLYMERIZING A MONOMERIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND MIXTURES THEREOF WITH UP TO 20%, BASED ON THE WEIGHT OF THE MIXTURES, OF OTHER ETHYLENICALLY UNSATURATED COMPOUNDS COPOLYMERIZABLE THEREWITH WHICH COMPRISES SUSPENDING, AGITATING AND POLYMERIZING SAID MONOMERIC SUBSTANCE IN A REACTION MASS COMPRISING AN AQUEOUS SOLUTION OF A PROTECTIVE COLLOID, A PEROXIDE CATALYST SOLUBLE IN SAID MONOMERIC SUBSTANCE AND AT LEAST 0.05%, BASED ON THE WEIGHT OF SAID MONOMERIC SUBSTANCE, OF A SALT SELECTED FROM THE CLASS CONSISTING OF THE BARIUM, STRONTIUM, CALCIUM, TIN AND ZINC NEUTRAL SALTS OF ALKYL BETAIMINO DIPROPIONIC ACIDS IN WHICH THE ALKYL GROUPS CONTAIN FROM 8 TO 16 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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |