US2083073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm pump for automatic water systems
Assignee: DEMPSTER MILL Manufacturing Co
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Filing: 1933-11-03
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Granted: 1937-06-08
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Expires: 1953-11-03
Abstract
No abstract record available.
Inventors
- 👤 Herman M Loeber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:55
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B43/025; F04B43/026; F04B43/0009; F04B43/0081; F04B43/009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-06-07 | 1940-12-07 | 1941-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-07 | 1944-12-07 | 1945-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-07 | 1948-12-07 | 1949-06-08 | $7700.00 | Window Closed / Lapsed |