Patent US2605018A successfully refreshed from Google Patents.
Patent US2194809A successfully refreshed from Google Patents.
US2194809A
Expired / Lapsed
US
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Diaphragmeter
Assignee: Individual
•
Filing: 1939-05-20
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Granted: 1940-03-26
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Expires: 1959-05-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Daniel William Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/103; A61B5/11; A61B5/1107; A61B2562/00; A61B2562/02; A61B2562/0247; A61B5/68; A61B5/6801; A61B5/6813; A61B5/6823
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) | 1943-03-26 | 1943-09-25 | 1944-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-26 | 1947-09-25 | 1948-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-26 | 1951-09-25 | 1952-03-26 | $7700.00 | Window Closed / Lapsed |