US2556302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crossbar structure
Assignee: Whitehead and Kales Co
•
Filing: 1946-06-24
•
Granted: 1951-06-12
•
Expires: 1966-06-24
Abstract
No abstract record available.
Inventors
- 👤 Gerald D Stough
- 👤 Richard W Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
B; B61; B61D; B61D45/00; B61D45/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030773A
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US2056704A
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US2091869A
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US2309606A
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US2354861A
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US2294795A
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US2425875A
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US2440437A
Cited
US2497683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |