US3900577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing expanded dry gels
Assignee: General Foods Corp
•
Filing: 1971-08-16
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Granted: 1975-08-19
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Expires: 1991-08-16
Abstract
Abstract Expanded dry gels are produced by subjecting gels to a pressure of greater than about 50 p.s.i.g. and while still under pressure, freezing the gels. Subsequently the pressure is released and the frozen gels are thawed and dried. The pressure-frozen gels retain their shape while comparable non-pressure-frozen gels shrivel and shrink during drying.
Inventors
- 👤 Gerhard J Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:51
CPC Classifications
A; A23; A23G; A23G3/00; A23G3/34; A23G3/50; A23G3/52; A23G3/02; A23G3/0236; A23G3/0294; A23L; A23L29/00; A23L29/20; A23L29/275; A23L29/281; A23L29/284
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A METHOD OF PRODUCING EXPANDED, DRIED GELS COMPRISING YHE STEPS OF: A. CONTACTING A GELLED MATERIAL WITH A GAS AT A PRESSURE OF GREATER THAN ABOUT 50 P.S.I.G. FOR A PERIOD OF TIME SUFFICIENT TO ENABLE THE GAS TO DIFFUSE INTO THE GEL, SAID GAS BEING SELECTED FROM THE GROUP CONSISTING OF NITROGEN, AIR, CARBON MONOXIDE, FLUORINATED HYDROCARBONS, ETHANE, PROPANE, ETHYLENE, NEON AND ARGON, B. COMPLETELY FREEZING THE GELLED MATERIAL AT A TEMPERATURE BELOW ABOUT -10*C WHILE STILL UNDER SAID PRESSURE, C. RELEASING THE SAID PRUSSURE ON THE FROZEN GELLED MATERIAL, AND D. DRYING THE GEL.
Claim 2
Independent Claim
96 words
A METHOD OF PRODUCING EXPANDED, DRIED GELS COMPRISING YHE STEPS OF: A. CONTACTING A GELLED MATERIAL WITH A GAS AT A PRESSURE OF GREATER THAN ABOUT 50 P.S.I.G. FOR A PERIOD OF TIME SUFFICIENT TO ENABLE THE GAS TO DIFFUSE INTO THE GEL, SAID GAS BEING SELECTED FROM THE GROUP CONSISTING OF NITROGEN, AIR, CARBON MONOXIDE, FLUORINATED HYDROCARBONS, ETHANE, PROPANE, ETHYLENE, NEON AND ARGON, B. COMPLETELY FREEZING THE GELLED MATERIAL AT A TEMPERATURE BELOW ABOUT -10*C WHILE STILL UNDER SAID PRESSURE, C. RELEASING THE SAID PRUSSURE ON THE FROZEN GELLED MATERIAL, AND D. DRYING THE GEL.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the gelled material is a gelatin or agar gel.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the gelled material is flavored.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the gel is thawed before drying.
Claim 6
Dependent Claim
12 words
The method of claim 4 wherein the thawed gel is oven dried.
Claim 7
Dependent Claim
12 words
The method of claim 4 wherein the thawed gel is air dried.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |