Patent US1962617A successfully refreshed from Google Patents.
US2919650A
Expired / Lapsed
US
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Diaphragm pump for non-lubricating and chemically aggressive liquids
Assignee: Individual
•
Filing: 1956-09-24
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Granted: 1960-01-05
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Wiggermann Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:19
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)
US900357A
Cited
US1627257A
Cited
US1650377A
Cited
US1782144A
Cited
US1927587A
Cited
US2506434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |