US2964518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino-hydro-pyrolysis of woody materials
Assignee: FRANCIS H SNYDER AND ASSOCIATE
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Filing: 1956-06-28
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Granted: 1960-12-13
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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
2026-10-28 12:58
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/02; D21C3/024
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
THE PROCESS OF MODIFYING THE PROPERTIES OF LIGNOCELLULOSE MATERIAL, INCLUDING SATURATING THE MATERIAL WITH AN AQUEOUS STRONG ELECTROLYTE HAVING A NORMALITY IN EXCESS OF 0.1 UNTIL AT LEAST 10 POUNDS OF WATER ARE TAKEN UP BY 100 POUNDS AIR-DRY MATERIAL, FURTHER SATURATING THE MATERIAL WITH AMMONIA UNTIL AT LEAT 5.0 POUNDS OF AMMONIA ARE TAKEN UP BY 100 POUNDS AIR-DRY MATERIAL, SUBJECTING THE TREATED MATERIAL TO STEAM PRESSURE OF 600 TO 1,250 P.S.I. FOR NINETY MINUTES TO 1 MINUTE, DRAINING LIQUID FROM THE REACTED MASS AND FURTHER SEPARATING SAID MASS INTO A FIBROUS PORTION AND LIGNEOUS PORTION CONTAIN-
Claim 2
Dependent Claim
98 words
THE PROCESS OF MODIFYING THE PROPERTIES OF LIGNOCELLULOSE MATERIAL, INCLUDING SATURATING THE MATERIAL WITH AN AQUEOUS STRONG ELECTROLYTE HAVING A NORMALITY IN EXCESS OF 0.1 UNTIL AT LEAST 10 POUNDS OF WATER ARE TAKEN UP BY 100 POUNDS AIR-DRY MATERIAL, FURTHER SATURATING THE MATERIAL WITH AMMONIA UNTIL AT LEAT 5.0 POUNDS OF AMMONIA ARE TAKEN UP BY 100 POUNDS AIR-DRY MATERIAL, SUBJECTING THE TREATED MATERIAL TO STEAM PRESSURE OF 600 TO 1,250 P.S.I. FOR NINETY MINUTES TO 1 MINUTE, DRAINING LIQUID FROM THE REACTED MASS AND FURTHER SEPARATING SAID MASS INTO A FIBROUS PORTION AND LIGNEOUS PORTION CONTAIN-
Claim 3
Dependent Claim
14 words
THE PROCESS OF CLAIM 1 WHEREIN THE LIGNEOUS FRACTION IS SUBJECTED TO DRY DISTILLATION.
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |