Patent US2598519A successfully refreshed from Google Patents.
US2598519A
Expired / Lapsed
US
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Circuit controlling apparatus
Assignee: National Pneumatic Co Inc
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Filing: 1950-03-22
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Granted: 1952-05-27
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Expires: 1970-03-22
Abstract
No abstract record available.
Inventors
- 👤 Durbin Vernon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:27
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/56; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/947
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) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |