Patent US3149049A successfully refreshed from Google Patents.
US3149049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous starch enzymatic conversion process
Assignee: West Virginia Pulp and Paper Co
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Filing: 1962-05-21
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Granted: 1964-09-15
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Expires: 1982-05-21
Abstract
No abstract record available.
Inventors
- 👤 John H Walkup
- 👤 John G Leech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:57
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/14; Y; Y10; Y10S; Y10S435/00; Y10S435/813
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A CONTINUOUS PROCESS OF CONVERTING STARCH WHICH COMPRISES THE STEPS OF: (A) HEATING MIXTURE OF STARCH, WATER, AND ALPHA AMYLASE TO CONVERSION TEMPERATURE, (B) HOLDING THE MIXTURE AT THE CONVERSION TEMPERATURE TO ALLOW THE ALPHA AMYLASE TO EFFECT A MAJOR VISCOSITY REDUCTION IN THE STARCH MIXTURE, (C) RAPIDLY RAISING THE TEMPERATURE OF THE STARCH MIXTURE TO AN ELEVATED TEMPERATURE SUFFICIENTLY ABOVE THE CONVERSION TEMPERATURE AND HOLDING THE MIXTURE AT SAID ELEVATED TEMPERATURE TO INACTIVATE THE ALPHA AMYLASE AND TO EFFECT A FURTHER REDUCTION IN THE VISCOSITY OF THE STARCH MIXTURE, (D) COOLING THE MIXTURE TO CONVERSION TEMPERATURE, (E) CONTINUOUSLY MEASURING THE VISCOSITY OF THE MIXTURE AT THE CONVERSION TEMPERATURE, (F) ADDING TO THE MIXTURE FRESH ALPHA AMYLASE AT A RATE BASED ON SAID MEASURED VISCOSITY AND ON THE DESIRED FINAL VISCOSITY, (G) HOLDING THE MIXTURE AT CONVERSION TEMPERATURE TO ALLOW THE ALPHA AMYLASE TO FURTHER DEGRADE THE STARCH TO THE DESIRED FINAL VISCOSITY, (H) AND ADDING A CHEMICAL DEACTIVATOR TO THE MIXTURE AT A RATE BASED ON THE FRESH ALPHA AMYLKASE ADDITION OF STEP (F) ABOVE TO INACTIVATE THE ALPHA AMYLASE.
Claim 2
Dependent Claim
181 words
A CONTINUOUS PROCESS OF CONVERTING STARCH WHICH COMPRISES THE STEPS OF: (A) HEATING MIXTURE OF STARCH, WATER, AND ALPHA AMYLASE TO CONVERSION TEMPERATURE, (B) HOLDING THE MIXTURE AT THE CONVERSION TEMPERATURE TO ALLOW THE ALPHA AMYLASE TO EFFECT A MAJOR VISCOSITY REDUCTION IN THE STARCH MIXTURE, (C) RAPIDLY RAISING THE TEMPERATURE OF THE STARCH MIXTURE TO AN ELEVATED TEMPERATURE SUFFICIENTLY ABOVE THE CONVERSION TEMPERATURE AND HOLDING THE MIXTURE AT SAID ELEVATED TEMPERATURE TO INACTIVATE THE ALPHA AMYLASE AND TO EFFECT A FURTHER REDUCTION IN THE VISCOSITY OF THE STARCH MIXTURE, (D) COOLING THE MIXTURE TO CONVERSION TEMPERATURE, (E) CONTINUOUSLY MEASURING THE VISCOSITY OF THE MIXTURE AT THE CONVERSION TEMPERATURE, (F) ADDING TO THE MIXTURE FRESH ALPHA AMYLASE AT A RATE BASED ON SAID MEASURED VISCOSITY AND ON THE DESIRED FINAL VISCOSITY, (G) HOLDING THE MIXTURE AT CONVERSION TEMPERATURE TO ALLOW THE ALPHA AMYLASE TO FURTHER DEGRADE THE STARCH TO THE DESIRED FINAL VISCOSITY, (H) AND ADDING A CHEMICAL DEACTIVATOR TO THE MIXTURE AT A RATE BASED ON THE FRESH ALPHA AMYLKASE ADDITION OF STEP (F) ABOVE TO INACTIVATE THE ALPHA AMYLASE.
References Cited (Backward Citations)
US2647854A
Cited
US2967804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |