US3265632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous thermally reversible rigid sodium hydroxide gel and process for preparing same
Assignee: Unilever Bestfoods North America
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Filing: 1963-04-09
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Granted: 1966-08-09
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Expires: 1983-04-09
Abstract
No abstract record available.
Inventors
- 👤 Harry W Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; B; B01; B01J; B01J19/00; B01J19/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
A PROCESS FOR THE PREPARATION OF A THERMALLY REVERSIBLE RIGID SODIUM HYDROXIDE GEL WHICH COMPRISES DISSOLVING AMYLOSE IN WATER HAVING A TEMPERATURE OF AT LEAST ABOUT 65*C., ADDING SODIUM HYDROXIDE IN CONCENTRATED FORM, AND COOLING THE RESULTING MIXTURE TO A TEMPERATURE SUFFICIENT TO EFFECT CONGELATION, THE PROPORTION OF AMYLOSE BEING SUFFICIENT TO PROVIDE AT LEAST ABOUT 0.1% AMYLOSE ON A DRY WEIGHT PER VOLUME BASIS OF THE FINAL COMPOSITION, AND THE PROPORTION OF SODIUM HYDROXIDE BEING SUFFICIENT TO PROVIDE A FINAL CONCENTRATION OF SODIUM HYDROXIDE BETWEEN ABOUT 4 AND ABOUT 9 NORMAL.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE PREPARATION OF A THERMALLY REVERSIBLE RIGID SODIUM HYDROXIDE GEL WHICH COMPRISES DISSOLVING AMYLOSE IN WATER HAVING A TEMPERATURE OF AT LEAST ABOUT 65*C., ADDING SODIUM HYDROXIDE IN CONCENTRATED FORM, AND COOLING THE RESULTING MIXTURE TO A TEMPERATURE SUFFICIENT TO EFFECT CONGELATION, THE PROPORTION OF AMYLOSE BEING SUFFICIENT TO PROVIDE AT LEAST ABOUT 0.1% AMYLOSE ON A DRY WEIGHT PER VOLUME BASIS OF THE FINAL COMPOSITION, AND THE PROPORTION OF SODIUM HYDROXIDE BEING SUFFICIENT TO PROVIDE A FINAL CONCENTRATION OF SODIUM HYDROXIDE BETWEEN ABOUT 4 AND ABOUT 9 NORMAL.
Claim 3
Dependent Claim
46 words
AN AQUEOUS THERMALLY REVERSIBLE RIGID SODIUM HYDROXIDE GEL CONSISTING ESSENTIALLY OF AQUEOUS SODIUM HYDROXIDE AT A CONCENTRATION OF BETWEEN ABOUT 4 AND ABOUT 9 NORMAL AND AMYLOSE AS A GELLING AGENT AT A CONCENTRATION OF AT LEAST ABOUT 0.1% ON A DRY WEIGHT PER VOLUME BASIS.
Claim 4
Dependent Claim
46 words
AN AQUEOUS THERMALLY REVERSIBLE RIGID SODIUM HYDROXIDE GEL CONSISTING ESSENTIALLY OF AQUEOUS SODIUM HYDROXIDE AT A CONCENTRATION OF BETWEEN ABOUT 4 AND ABOUT 9 NORMAL AND AMYLOSE AS A GELLING AGENT AT A CONCENTRATION OF AT LEAST ABOUT 0.1% ON A DRY WEIGHT PER VOLUME BASIS.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |