US3035045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of starch with n, n'-methylenebis-acrylamide
Assignee: Union Starch and Refining Co
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Filing: 1959-08-31
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Granted: 1962-05-15
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Expires: 1979-08-31
Abstract
No abstract record available.
Inventors
- 👤 Trimnell Donald
- 👤 Chim P Patel
- 👤 Jack F Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:18
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE PROCESS FOR PRODUCING A STARCH OF INCREASED VISCOSITY COMPRISING PROVDING STARCH IN THE FORM OF AN AQUEOUS SLURRY OF 17-24* BE., ADJUSTING THE PH OF THE STARCH SLURRY TO 5-6, REACTING THE SLURRY THUS OBTAINED WITH .02-0.5% BY WEIGHT OF THE STARCH OF N,N,'' -METHYLENE-BIS-ACRYLAMIDE IN THE PRESENCE OF ABOUT .025-095% BY WEIGHT OF THE STARCH OF AN OXIDATION-REDUCTION CATALYST MIXTURE WHILE MAINTAINING THE TEMPERATURE AT ABOUT 80-130* F. AND FOR A TIME OF 1/2 TO 8 HOURS
Claim 2
Dependent Claim
79 words
THE PROCESS FOR PRODUCING A STARCH OF INCREASED VISCOSITY COMPRISING PROVDING STARCH IN THE FORM OF AN AQUEOUS SLURRY OF 17-24* BE., ADJUSTING THE PH OF THE STARCH SLURRY TO 5-6, REACTING THE SLURRY THUS OBTAINED WITH .02-0.5% BY WEIGHT OF THE STARCH OF N,N,'' -METHYLENE-BIS-ACRYLAMIDE IN THE PRESENCE OF ABOUT .025-095% BY WEIGHT OF THE STARCH OF AN OXIDATION-REDUCTION CATALYST MIXTURE WHILE MAINTAINING THE TEMPERATURE AT ABOUT 80-130* F. AND FOR A TIME OF 1/2 TO 8 HOURS
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) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |