Patent US2838877A successfully refreshed from Google Patents.
US2838877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil conditioning
Assignee: Individual
•
Filing: 1953-05-04
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Granted: 1958-06-17
•
Expires: 1973-05-04
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Working
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:48
CPC Classifications
A; A01; A01G; A01G7/00; C; C05; C05F; C05F11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
AS AN AGRICULTURAL SOIL ADDITIVE A SOLUBLE LIME SALT OF THE ACID EXTRACT FROM THE WOOD OF REDWOOD TREES, FORMED BY EXTRACTING SAID WOOD IN THE FORM OF SAWDUST, CHIPS, AND THE LIKE, WITH HOT WATER AND NEUTRALIZING THE AQUEOUS ACID SOLUTION WITH LIME.
Claim 2
Dependent Claim
44 words
AS AN AGRICULTURAL SOIL ADDITIVE A SOLUBLE LIME SALT OF THE ACID EXTRACT FROM THE WOOD OF REDWOOD TREES, FORMED BY EXTRACTING SAID WOOD IN THE FORM OF SAWDUST, CHIPS, AND THE LIKE, WITH HOT WATER AND NEUTRALIZING THE AQUEOUS ACID SOLUTION WITH LIME.
References Cited (Backward Citations)
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Cited
US509703A
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US1390796A
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US1933445A
Cited
US2033411A
Cited
US2092100A
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US2498480A
Cited
US2574027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |