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US2649181A
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US
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Moving stairway
Assignee: Westinghouse Electric Corp
•
Filing: 1948-06-01
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Granted: 1953-08-18
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Expires: 1968-06-01
Abstract
No abstract record available.
Inventors
- 👤 Hans E Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:22
CPC Classifications
B; B66; B66B; B66B23/00; B66B23/02; B66B23/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1868780A
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US1984801A
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US2198167A
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US2231709A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |