Patent US4089745A successfully refreshed from Google Patents.
US4089745A
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Process for enzymatically converting cellulose derived from corn hulls to glucose
Assignee: Stabra AG
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Filing: 1976-12-27
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Granted: 1978-05-16
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Expires: 1996-12-27
Abstract
Abstract Corn hulls are subjected to a liquid extraction treatment whereby the major portion of the cellulose is liberated from the other constituents of the corn hulls and the resulting cellulose fraction is enzymatically treated to convert a substantial portion thereof to glucose.
Inventors
- 👤 Richard Lee Antrim
- 👤 Donald Wayne Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:22
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A process for enzymatically converting corn hull cellulose to glucose comprising treating corn hulls with a sufficient amount of alkali to hydrolyze the hulls to affect liberation of a hemicellulose fraction, a non-carbohydrate fraction and a cellulose fraction and enzymatically treating the cellulose to convert a substantial portion thereof to glucose.
Claim 2
Dependent Claim
51 words
A process for enzymatically converting corn hull cellulose to glucose comprising treating corn hulls with a sufficient amount of alkali to hydrolyze the hulls to affect liberation of a hemicellulose fraction, a non-carbohydrate fraction and a cellulose fraction and enzymatically treating the cellulose to convert a substantial portion thereof to glucose.
Claim 3
Dependent Claim
84 words
A process for enzymatically converting corn hull cellulose to glucose as defined in claim 1, wherein alkaline hydrolysis of the hulls is performed using an aqueous system whereby the hemicellulose and non-carbohydrate fractions are solubilized, recovering the solubilized fractions from the insoluble residue comprising the cellulose fraction, treating the solubilized fractions with a water miscible organic solvent to precipitate the hemicellulose, recovering the non-carbohydrate fraction from the organic solvent, and enzymatically treating the recovered cellulose fraction to convert a substantial portion thereof to glucose.
Claim 4
Dependent Claim
24 words
A process for enzymatically converting corn hull cellulose to glucose as defined in claim 2, wherein the cellulose is treated with a cellulase enzyme.
Claim 5
Dependent Claim
23 words
A method of enzymatically converting corn hull cellulose to glucose as defined in claim 3, wherein the cellulase is derived from Trichoderma viride.
Claim 6
Dependent Claim
23 words
A method of enzymatically converting corn hull cellulose of glucose as defined in claim 3, wherein the cellulase is derived from Aspergillus species.
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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |