Patent US3299052A successfully refreshed from Google Patents.
US3299052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-dispersible form of dialdehyde starch and process therefor
Assignee: Bayer Corp
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Filing: 1963-12-12
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Granted: 1967-01-17
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Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Curtis James Huey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:54
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/18; C08B31/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
A COMPOSITION DISPERSIBLE IN WATER AT ROOM TEMPERATURE CONSISTING ESSENTIALLY OF THE FINELY-DIVIDED SOLIDIFIED REACTION PRODUCT OF FROM ABOUT 15 TO ABOUT 30 PARTS BY WEIGHT HYPOCHLORITE OXIDIZED STARCH AND FROM ABOUT 70 TO ABOUT 85 PARTS BY WEIGHT DIALDEHYDE STARCH WHERIN FROM ABOUT 90 TO ABOUT 100 UNITS OUT OF 100 OF THE ORIGINAL ANHYDROGLUCOSE UNITS OF THE ORIGINAL STARCH HAVE BEEN OXIDIZED TO DIALDEHYDE UNITS REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
71 words
A COMPOSITION DISPERSIBLE IN WATER AT ROOM TEMPERATURE CONSISTING ESSENTIALLY OF THE FINELY-DIVIDED SOLIDIFIED REACTION PRODUCT OF FROM ABOUT 15 TO ABOUT 30 PARTS BY WEIGHT HYPOCHLORITE OXIDIZED STARCH AND FROM ABOUT 70 TO ABOUT 85 PARTS BY WEIGHT DIALDEHYDE STARCH WHERIN FROM ABOUT 90 TO ABOUT 100 UNITS OUT OF 100 OF THE ORIGINAL ANHYDROGLUCOSE UNITS OF THE ORIGINAL STARCH HAVE BEEN OXIDIZED TO DIALDEHYDE UNITS REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
108 words
A PROCESS FOR PREPARING A COMPOSITION DISPERSIBLE IN WATER AT ROOM TEMPERATURE WHICH COMPRISES MIXING IN WATER A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 70 PARTS BY WEIGHT DIALDEHYDE STARCH AND ABOUT 30 PARTS BY WEIGHT HYPOCHLORITE OXIDIZED STARCHTO FORM A SLURRY CONTAINING ABOUT 10-15 WEIGHT PERCENT SOLIDS, REACGING THE NONAQUEOUS CONSTITUENTS OF THE SLURRY WITH EACH OTHER BY HEATING THE SLURRY TO ABOUT 95%-97%C. FOR ABOUT 2-15 MINUTES WITH STIRRING UNTIL THE DISPERSION OF THE SOLID MATERIAL IS COMPLETE, COOLING THE DISPERSION TO ABOUT 70% C., ADJUSTING THE PH OF THE DISPERSION TO ABOUT 4.3-4.5 AND THEN SPRAY DRYING THE DISPERSION AND COLLECTING THE FINELYDIVIDED DRIED SOLIDIFIED PRODUCT.
Claim 4
Dependent Claim
108 words
A PROCESS FOR PREPARING A COMPOSITION DISPERSIBLE IN WATER AT ROOM TEMPERATURE WHICH COMPRISES MIXING IN WATER A MIXTURE CONSISTING ESSENTIALLY OF ABOUT 70 PARTS BY WEIGHT DIALDEHYDE STARCH AND ABOUT 30 PARTS BY WEIGHT HYPOCHLORITE OXIDIZED STARCHTO FORM A SLURRY CONTAINING ABOUT 10-15 WEIGHT PERCENT SOLIDS, REACGING THE NONAQUEOUS CONSTITUENTS OF THE SLURRY WITH EACH OTHER BY HEATING THE SLURRY TO ABOUT 95%-97%C. FOR ABOUT 2-15 MINUTES WITH STIRRING UNTIL THE DISPERSION OF THE SOLID MATERIAL IS COMPLETE, COOLING THE DISPERSION TO ABOUT 70% C., ADJUSTING THE PH OF THE DISPERSION TO ABOUT 4.3-4.5 AND THEN SPRAY DRYING THE DISPERSION AND COLLECTING THE FINELYDIVIDED DRIED SOLIDIFIED PRODUCT.
References Cited (Backward Citations)
US2989521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |