US2700728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic switch control system for classification yards
Assignee: SPX Technologies Inc
•
Filing: 1950-08-15
•
Granted: 1955-01-25
•
Expires: 1970-08-15
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Brixner
- 👤 Heyward J Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:29
CPC Classifications
B; B61; B61L; B61L17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2216610A
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US2194352A
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US2194353A
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US2255142A
Cited
US2300272A
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US2398588A
Cited
US2425109A
Cited
US2550859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-24 | 1958-07-26 | 1959-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-24 | 1962-07-26 | 1963-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-24 | 1966-07-26 | 1967-01-25 | $7700.00 | Window Closed / Lapsed |