US3381822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control and circulation valve
Assignee: Hpe Inc
•
Filing: 1965-05-05
•
Granted: 1968-05-07
•
Expires: 1985-05-05
Abstract
No abstract record available.
Inventors
- 👤 Rand H Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:45
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27; B01D29/50; B01D29/52; B01D35/00; B01D35/05; B01D35/14; B01D35/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1385401A
Cited
US1796613A
Cited
US2101014A
Cited
US2435201A
Cited
US2792943A
Cited
US2985308A
Cited
FR1335720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |