US2672889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit controller
Assignee: Individual
•
Filing: 1950-09-01
•
Granted: 1954-03-23
•
Expires: 1970-09-01
Abstract
No abstract record available.
Inventors
- 👤 Grant A Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:24
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US438301A
Cited
US883992A
Cited
US1627685A
Cited
US2174086A
Cited
US2214616A
Cited
US2258835A
Cited
US2417788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |