US2592770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-oscillator controlled relay system
Assignee: MACMILLIN ENGINEERING CORP
•
Filing: 1947-02-08
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Granted: 1952-04-15
•
Expires: 1967-02-08
Abstract
No abstract record available.
Inventors
- 👤 George A Waldie
- 👤 Howard F Macmillin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:09
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/0405; Y; Y10; Y10T; Y10T408/00; Y10T408/08; Y10T409/00; Y10T409/30; Y10T409/300056; Y10T409/300168; Y10T82/00; Y10T82/14; Y10T82/141; Y10T82/143; Y10T82/25; Y10T82/2531; Y10T82/2533; Y10T82/2535
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |