US1298532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-difference-creating device for flow-meters and the like.
Assignee: General Electric Co
•
Filing: 1918-09-04
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Granted: 1919-03-25
•
Expires: 1938-09-04
Abstract
No abstract record available.
Inventors
- 👤 Harold H Mapelsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:46
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/34; G01F1/36; G01F1/40; G01F1/42; Y; Y10; Y10S; Y10S261/00; Y10S261/57
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) | 1922-03-24 | 1922-09-23 | 1923-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-03-24 | 1926-09-23 | 1927-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-03-24 | 1930-09-23 | 1931-03-25 | $7700.00 | Window Closed / Lapsed |