US3200098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of acrylamide monomer in the presence of free ammonia and the resulting polyacrylamide product
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1961-02-28
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Granted: 1965-08-10
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 Mayer B Goren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:52
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A POLYMERIZATION PROCESS COMPRISING REACTING AN ALKALINE AQUEOUS REACTION MIXTURE CONTAINING INITIALLY NOT MORE THAN ABOUT 15% BY WEIGHT OF ACRYLAMIDE MONOMER IN THE PRESENCE OF A FREE RADICAL CATALYST AND A WATER SOLUBLE SUBSTANCE PROVIDING 1X10**2 TO 3X11**1 MOL OF FREE AMMONIA PER MOL OF ACRYLAMIDE MONOMER INITIALLY PRESENT TO PRODUCE A WATER SWELLABLE AND DISPERSIBLE POLYMERIZATION PRODUCT.
Claim 2
Dependent Claim
59 words
A POLYMERIZATION PROCESS COMPRISING REACTING AN ALKALINE AQUEOUS REACTION MIXTURE CONTAINING INITIALLY NOT MORE THAN ABOUT 15% BY WEIGHT OF ACRYLAMIDE MONOMER IN THE PRESENCE OF A FREE RADICAL CATALYST AND A WATER SOLUBLE SUBSTANCE PROVIDING 1X10**2 TO 3X11**1 MOL OF FREE AMMONIA PER MOL OF ACRYLAMIDE MONOMER INITIALLY PRESENT TO PRODUCE A WATER SWELLABLE AND DISPERSIBLE POLYMERIZATION PRODUCT.
References Cited (Backward Citations)
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Cited
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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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |