Patent US2721101A successfully refreshed from Google Patents.
US2721101A
Expired / Lapsed
US
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Soil moisture control
Assignee: Individual
•
Filing: 1953-09-23
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Granted: 1955-10-18
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Expires: 1973-09-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph D Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:30
CPC Classifications
G; G05; G05D; G05D22/00; G05D22/02; A; A01; A01G; A01G25/00; A01G25/16; A01G25/167; Y; Y10; Y10S; Y10S239/00; Y10S239/15; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1866; Y10T137/189
Claims Analysis
Total Claims: 0
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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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |