Patent US3416461A successfully refreshed from Google Patents.
US3416461A
Expired / Lapsed
US
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Diaphragm pump
Assignee: Durion Co Inc
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Filing: 1966-09-01
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Granted: 1968-12-17
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Expires: 1986-09-01
Abstract
No abstract record available.
Inventors
- 👤 Mcfarland Rolland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:03
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/02; F04B43/06; F04B43/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711803A
Cited
US2148957A
Cited
US2267280A
Cited
US2675758A
Cited
US2575398A
Cited
US3075468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |