Patent US3406715A successfully refreshed from Google Patents.
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 16:23
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |