Patent US2420958A successfully refreshed from Google Patents.
US2420958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irrigator
Assignee: Individual
•
Filing: 1945-04-03
•
Granted: 1947-05-20
•
Expires: 1965-04-03
Abstract
No abstract record available.
Inventors
- 👤 William L Landreth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:02
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/14; B05B1/26; B05B1/262
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US306767A
Cited
US418477A
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GB189815567A
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US696057A
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US1233417A
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US1883656A
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US1863914A
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US2092846A
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US2213955A
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US2324234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |