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Patent US2493388A successfully refreshed from Google Patents.
US2493388A
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Magnetic control system
Assignee: National Cylinder Gas Co
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Filing: 1946-08-17
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Granted: 1950-01-03
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Expires: 1966-08-17
Abstract
No abstract record available.
Inventors
- 👤 Albert M Candy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:57
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE211692C
Cited
US381815A
Cited
US2143298A
Cited
GB191325919A
Cited
FR687944A
Cited
US1844531A
Cited
US1943463A
Cited
US2443300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |