US2423609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bellows operated rheostat
Assignee: Individual
•
Filing: 1944-11-10
•
Granted: 1947-07-08
•
Expires: 1964-11-10
Abstract
No abstract record available.
Inventors
- 👤 Leslie H Middleton
- 👤 Edward A Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:19
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0033; G01L9/0035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1089081A
Cited
DE384671C
Cited
US1686796A
Cited
US1942496A
Cited
US2283378A
Cited
US2373591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |