US3461808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm hand pumps
Assignee: John Wood Co
•
Filing: 1967-07-03
•
Granted: 1969-08-19
•
Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Lowell F Nelson
- 👤 Louis G Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/02; F04B43/023; F04B53/00; F04B53/10; F04B53/1037; F04B53/104; F04B53/1042; F04B53/1047; F04B53/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US677474A
Cited
FR343327A
Cited
US2751850A
Cited
FR1059606A
Cited
US2918878A
Cited
GB922256A
Cited
US3094076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |