US1577909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording venturi meter
Assignee: Siemens and Halske AG
•
Filing: 1921-08-24
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Granted: 1926-03-23
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Expires: 1941-08-24
Abstract
No abstract record available.
Inventors
- 👤 Kath Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:24
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/37; G01F1/375
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) | 1929-03-22 | 1929-09-21 | 1930-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-03-22 | 1933-09-21 | 1934-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-03-22 | 1937-09-21 | 1938-03-23 | $7700.00 | Window Closed / Lapsed |