Patent US2220902A successfully refreshed from Google Patents.
US2220902A
Expired / Lapsed
US
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Gauge diaphragm mounting
Assignee: ROCHESTER Manufacturing CO Inc
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Filing: 1937-04-08
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Granted: 1940-11-12
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Expires: 1957-04-08
Abstract
No abstract record available.
Inventors
- 👤 Hastings Herbert
- 👤 George E Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0672; G01L19/0618; G01L7/00; G01L7/02; G01L7/08; G01L7/082; G01L7/084; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49877; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918; Y10T29/49925; Y10T29/49934
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) | 1943-11-12 | 1944-05-13 | 1944-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-12 | 1948-05-13 | 1948-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-12 | 1952-05-13 | 1952-11-12 | $7700.00 | Window Closed / Lapsed |