US2507153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for refining copolymeric beads of isopropenyl acetate and fumaric acid alkyl esters
Assignee: Eastman Kodak Co
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Filing: 1946-07-31
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Granted: 1950-05-09
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Expires: 1966-07-31
Abstract
No abstract record available.
Inventors
- 👤 William M Gearhart
- 👤 Harry R Mcamis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:44
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR REFINING AND REMOVING OCCLUDED MONOMERS FROM COPOLYMERIC BEADS OF ISOPROPENYL ACETATE AND A FUMARIC ACID ALKYL ESTER, SAID ALKYL GROUP BEING SATURATED AND HAVING NOT MORE THAN 3 CARBON ATOMS, WHICH COMPRISES SOAKING AT 15* TO 35*C., 1 PART BY WEIGHT OF THE BEADS WITH 2 TO 4 PARTS BY WEIGHT OF A LIQUID MIXTURE OF 70 TO 98 PERCENT BY VOLUME OF METHANOL AND 30 TO 2 PER CENT BY VOLUME OF WATER, AND THEN SEPARATING THE SOAKED BEADS FROM THE LIQUID.
Claim 2
Dependent Claim
86 words
A PROCESS FOR REFINING AND REMOVING OCCLUDED MONOMERS FROM COPOLYMERIC BEADS OF ISOPROPENYL ACETATE AND A FUMARIC ACID ALKYL ESTER, SAID ALKYL GROUP BEING SATURATED AND HAVING NOT MORE THAN 3 CARBON ATOMS, WHICH COMPRISES SOAKING AT 15* TO 35*C., 1 PART BY WEIGHT OF THE BEADS WITH 2 TO 4 PARTS BY WEIGHT OF A LIQUID MIXTURE OF 70 TO 98 PERCENT BY VOLUME OF METHANOL AND 30 TO 2 PER CENT BY VOLUME OF WATER, AND THEN SEPARATING THE SOAKED BEADS FROM THE LIQUID.
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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |