US2457228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leveling and training mechanism
Assignee: Westinghouse Electric Corp
•
Filing: 1944-03-01
•
Granted: 1948-12-28
•
Expires: 1964-03-01
Abstract
No abstract record available.
Inventors
- 👤 Clinton R Hanna
- 👤 Lawrence B Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:05
CPC Classifications
B; B63; B63B; B63B29/00; B63B29/02; B63B29/04; B63B29/12; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1257
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1731776A
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US1733531A
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US1679354A
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US1840104A
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US1988458A
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US2014825A
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US1998939A
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US2236340A
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US2385204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |