US3406715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain valve
Assignee: Ris Irrigation Systems
•
Filing: 1965-10-04
•
Granted: 1968-10-22
•
Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 John O Hruby Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:13
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7936; Y10T137/794; Y10T137/8122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1001510A
Cited
US1156274A
Cited
US1897572A
Cited
US2077040A
Cited
US2106671A
Cited
US2375498A
Cited
US2495754A
Cited
US2600554A
Cited
US2888034A
Cited
US3234961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |