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Patent US1424728A successfully refreshed from Google Patents.
US1424728A
Expired / Lapsed
US
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Process of and apparatus for soil treatment
Assignee: SAID KNIGHT
•
Filing: 1921-01-05
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Granted: 1922-08-01
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Expires: 1941-01-05
Abstract
No abstract record available.
Inventors
- 👤 Knight Herbert
- 👤 Charles A Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:22
CPC Classifications
A; A01; A01B; A01B35/00; A01B35/16; Y; Y10; Y10S; Y10S37/00; Y10S37/905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-07-31 | 1926-01-30 | 1926-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-31 | 1930-01-30 | 1930-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-31 | 1934-01-30 | 1934-08-01 | $7700.00 | Window Closed / Lapsed |