US3047534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polymerization on a rubbery polymer in aqueous suspension employing polyvinyl alcohol and a metal phosphate as suspending agents, and product obtained thereby
Assignee: Cosden Petroleum Corp
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Filing: 1959-10-07
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Granted: 1962-07-31
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Expires: 1979-10-07
Abstract
No abstract record available.
Inventors
- 👤 Robert H Dyer
- 👤 Rene P Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
C; C08; C08F; C08F291/00; C08F291/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
METHOD OF GRAFT POLYMERIZATION COMPRISING DISSOLVING RUBBERY POLYMER IN A POLYMERIZABLE ETHYLENICALLY UPSATURATED MONOMER LIQUID AND SUSPENDING SAID SOLUTION IN A HOT AGITATED AQUEOUS BATH CONTAINING A SMALL QUANTITY OF A POLYVINYL ALCOHOL AND A PHOSPHATE OF THE GROUP CONSISTING OF CALCIUM, BARIUM AND MAGNESIUM, THE POLYVINYL ALCOHOL BEING IN THE RANGE OF ABOUT .001 TO 5%, AND THE PHOSPHATE BEING IN THE RANGE OF ABOUT 0.01 TO 5%, AND THE COMPONENT SUSPENDING AGENTS BEING VARIABLE IN QUANTITY WITHIN THE SAID RANGES WHEREBY THE SAID MINIMUM QUANTITY OF POLYVINYL ALCOHOL WILL BE INCREASED TO AT LEAST 0.1% WHEN THE PHOSPHATE IS NEAR THE MINIMUM QUANTITY OF ITS RANGE.
Claim 2
Dependent Claim
108 words
METHOD OF GRAFT POLYMERIZATION COMPRISING DISSOLVING RUBBERY POLYMER IN A POLYMERIZABLE ETHYLENICALLY UPSATURATED MONOMER LIQUID AND SUSPENDING SAID SOLUTION IN A HOT AGITATED AQUEOUS BATH CONTAINING A SMALL QUANTITY OF A POLYVINYL ALCOHOL AND A PHOSPHATE OF THE GROUP CONSISTING OF CALCIUM, BARIUM AND MAGNESIUM, THE POLYVINYL ALCOHOL BEING IN THE RANGE OF ABOUT .001 TO 5%, AND THE PHOSPHATE BEING IN THE RANGE OF ABOUT 0.01 TO 5%, AND THE COMPONENT SUSPENDING AGENTS BEING VARIABLE IN QUANTITY WITHIN THE SAID RANGES WHEREBY THE SAID MINIMUM QUANTITY OF POLYVINYL ALCOHOL WILL BE INCREASED TO AT LEAST 0.1% WHEN THE PHOSPHATE IS NEAR THE MINIMUM QUANTITY OF ITS RANGE.
Claim 3
Dependent Claim
18 words
THE METHOD AS DEFINED IN CLAIM 1 WHEREIN THE RUBBERY POLYMER IS A COPOLYMER OF STYRENE AND BUTADIENE.
Claim 4
Dependent Claim
12 words
THE METHOD AS DEFINED IN CLAIM 10 WHEREIN THE MONOMER IS STYRENE.
References Cited (Backward Citations)
US2886553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |