Patent US326380A successfully refreshed from Google Patents.
Patent US2735756A successfully refreshed from Google Patents.
US2735756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing soil improvement
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:39
CPC Classifications
C; C05; C05F; C05F7/00; C05F7/02; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A PROCESS INCLUDING THE STEPS OF HEATING A PARTICULATE LIGNOCELLULOSIC MATERIAL AND A MINERAL ACID AT A TEMPERATURE IN EXCESS OF THE BOILING POINT OF WATER BUT BELOW THE CHARRING TEMPERATURE OF SAID MATERIAL TO PRODUCE A SUBSTANTIALLY DRY SOIL IMPROVING AGENT, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID AGENT, AT A TEMPERATURE IN EXCESS OF THE BOILING POINT OF WATER, WITH AN AQUEOUS MEDIUM TO GENERATE STEAM IN SITU IN SAID AGENT AN ENHANCE THE EFFECTIVENESS THEREOF FOR IMPROVING SOILS AS SEED GERMINATION AND PLANT GROWING MEDIA.
Claim 2
Dependent Claim
88 words
IN A PROCESS INCLUDING THE STEPS OF HEATING A PARTICULATE LIGNOCELLULOSIC MATERIAL AND A MINERAL ACID AT A TEMPERATURE IN EXCESS OF THE BOILING POINT OF WATER BUT BELOW THE CHARRING TEMPERATURE OF SAID MATERIAL TO PRODUCE A SUBSTANTIALLY DRY SOIL IMPROVING AGENT, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID AGENT, AT A TEMPERATURE IN EXCESS OF THE BOILING POINT OF WATER, WITH AN AQUEOUS MEDIUM TO GENERATE STEAM IN SITU IN SAID AGENT AN ENHANCE THE EFFECTIVENESS THEREOF FOR IMPROVING SOILS AS SEED GERMINATION AND PLANT GROWING MEDIA.
References Cited (Backward Citations)
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Cited
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Cited
US1933445A
Cited
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Cited
US2541058A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |