Patent US2502573A successfully refreshed from Google Patents.
US2502573A
Expired / Lapsed
US
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Control apparatus
Assignee: —
•
Filing: —
•
Granted: 1950-04-04
•
Expires: 1967-04-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:02
CPC Classifications
G; G05; G05G; G05G15/00; F; F16; F16D; F16D23/00; F16D23/02; F16D23/10; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/047; F16K31/048; G05G1/00; G05G2700/00; G05G2700/02; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18688; Y10T74/19; Y10T74/19614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |