US1725374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot-controlled demand meter
Assignee: Doherty Research Co
•
Filing: 1927-09-10
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Granted: 1929-08-20
•
Expires: 1947-09-10
Abstract
No abstract record available.
Inventors
- 👤 Earl S Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:50
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/60; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759
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) | 1932-08-19 | 1933-02-18 | 1933-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-08-19 | 1937-02-18 | 1937-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-08-19 | 1941-02-18 | 1941-08-20 | $7700.00 | Window Closed / Lapsed |