Patent US1473173A successfully refreshed from Google Patents.
US1473173A
Expired / Lapsed
US
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Dieeerential diaphragm
Assignee: —
•
Filing: —
•
Granted: 1923-11-06
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Expires: 1940-11-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:33
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/02; F15; F15C; F15C3/00; F15C3/04; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/0113
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) | 1926-11-05 | 1927-05-07 | 1927-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-11-05 | 1931-05-07 | 1931-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-11-05 | 1935-05-07 | 1935-11-06 | $7700.00 | Window Closed / Lapsed |