US2918878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-acting diaphragm pump
Assignee: Symington Wayne Corp
•
Filing: 1957-12-05
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Granted: 1959-12-29
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Expires: 1977-12-05
Abstract
No abstract record available.
Inventors
- 👤 Clifford V Zieg
- 👤 John C Lee
- 👤 Robert D Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:50
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0054; F04B43/02; F04B43/025; F04B43/026; F04B53/00; F04B9/00; F04B9/14; Y; Y10; Y10T; Y10T137/00; Y10T137/3149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |