Patent US2835611A successfully refreshed from Google Patents.
US2835611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sugars from wood products
Assignee: Individual
•
Filing: 1956-06-28
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Granted: 1958-05-20
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Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Francis H Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:54
CPC Classifications
C; C13; C13K; C13K13/00; C13K13/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR THE PRODUCTION OF SUGARS FROM WOODY MATERIALS COMPRISING IMPREGNATING THE WOOD WITH A MATERIAL OF THE CLASS CONSISTING OF THE HYDROXIDES OF THE ALKALI AND ALKALI-EARTH METALS AND AMMONIUM AND THE WEAK ACID SALTS THEREOF IN AN AMOUNT SUFFICIENT TO OBTAIN A PH OF 3.1 TO 3.4 IN THE SUBSEQUENT REACTION PRODUCT, SUBJECTING THE DRAINED WOOD, IN THE SUBSTANTIAL ABSENCE OF LIQUID, TO THE ACTION OF STEAM AT PRESSURES BETWEEN 600 AND 1250 P.S.I. FOR A TIME OF 5 MINUTES TO 1 MINUTE AND ABRUPTLY STOPPING THE REACTION.
Claim 2
Dependent Claim
91 words
A PROCESS FOR THE PRODUCTION OF SUGARS FROM WOODY MATERIALS COMPRISING IMPREGNATING THE WOOD WITH A MATERIAL OF THE CLASS CONSISTING OF THE HYDROXIDES OF THE ALKALI AND ALKALI-EARTH METALS AND AMMONIUM AND THE WEAK ACID SALTS THEREOF IN AN AMOUNT SUFFICIENT TO OBTAIN A PH OF 3.1 TO 3.4 IN THE SUBSEQUENT REACTION PRODUCT, SUBJECTING THE DRAINED WOOD, IN THE SUBSTANTIAL ABSENCE OF LIQUID, TO THE ACTION OF STEAM AT PRESSURES BETWEEN 600 AND 1250 P.S.I. FOR A TIME OF 5 MINUTES TO 1 MINUTE AND ABRUPTLY STOPPING THE REACTION.
References Cited (Backward Citations)
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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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |