Patent US3496874A successfully refreshed from Google Patents.
US3496874A
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Diaphragm actuated pulse pump
Assignee: JOHN S FINDLAY
•
Filing: 1968-04-16
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Granted: 1970-02-24
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Expires: 1988-04-16
Abstract
No abstract record available.
Inventors
- 👤 John S Findlay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:24
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/06; F04B43/067; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/117; A61M60/40; A61M60/424; A61M60/438; A61M60/441; A61M60/443; A61M60/80; A61M60/845; A61M60/851; F04B49/00; F04B49/12; F04B53/00; F04B53/10; F04B53/1037; F04B53/1047; F04B53/1055; A61M60/20; A61M60/247; A61M60/253; A61M60/268; A61M60/855; A61M60/89; A61M60/892; A61M60/894; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T74/00; Y10T74/16; Y10T74/1625; Y10T74/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2548807A
Cited
US2764097A
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US2960936A
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US3127846A
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US3218979A
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US3327322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |