Patent US2838465A successfully refreshed from Google Patents.
US2838465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick-pasting starch containing ureaformaldehyde and process of making the same
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1957-06-18
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Granted: 1958-06-10
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Expires: 1977-06-18
Abstract
No abstract record available.
Inventors
- 👤 Porowski Thaddeus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:26
CPC Classifications
C; C08; C08B; C08B31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS OF PREPARING A STARCH PRODUCT CHARACTERIZED BY ITS ABILITY TO COOK RAPIDLY IN AN AQUEOUS MEDIUM TO FORM HIGH VISCOSITY STARCH PASTES WHICH ARE STABLE AT HIGH TEMPERATURES WHICH COMPRISES, REACTING AT AN ACID PH AND AT A TEMPERATURE OF AT LEAST 70*F. BUT SUBSTANTIALLY BELOW THE PASTING TEMPERATURE OF THE STARCH AN AQUEOUS SLURRY OF UNMODIFIED STARCH WITH FROM ABOUT 0.50-0.15% OF AT LEAST ONE WATER-SOLUBLE, HEAT-REACTIVE, UREA-FORMALDEHYDE COMPOSITION UREA, MONOMETHYLOL UREA, AND WATER-SOLUBLE UREA-FORMALDEHYDE RESIN, BASED ON THE WEIGHT OF THE STARCH IN SAID SLURRY, ADJUSTING THE PH OF THE REACTED MEDIUM TO AN ALKALINE PH RANGING UP TO ABOUT 10, AND RECOVERING THE STARCH-RESIN REACTION PRODUCT FROM THE ALKALINE MEDIUM.
Claim 2
Dependent Claim
115 words
A PROCESS OF PREPARING A STARCH PRODUCT CHARACTERIZED BY ITS ABILITY TO COOK RAPIDLY IN AN AQUEOUS MEDIUM TO FORM HIGH VISCOSITY STARCH PASTES WHICH ARE STABLE AT HIGH TEMPERATURES WHICH COMPRISES, REACTING AT AN ACID PH AND AT A TEMPERATURE OF AT LEAST 70*F. BUT SUBSTANTIALLY BELOW THE PASTING TEMPERATURE OF THE STARCH AN AQUEOUS SLURRY OF UNMODIFIED STARCH WITH FROM ABOUT 0.50-0.15% OF AT LEAST ONE WATER-SOLUBLE, HEAT-REACTIVE, UREA-FORMALDEHYDE COMPOSITION UREA, MONOMETHYLOL UREA, AND WATER-SOLUBLE UREA-FORMALDEHYDE RESIN, BASED ON THE WEIGHT OF THE STARCH IN SAID SLURRY, ADJUSTING THE PH OF THE REACTED MEDIUM TO AN ALKALINE PH RANGING UP TO ABOUT 10, AND RECOVERING THE STARCH-RESIN REACTION PRODUCT FROM THE ALKALINE MEDIUM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |