Patent US792623A successfully refreshed from Google Patents.
US792623A
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US
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Moving spiral stairway or elevator.
Assignee: Individual
•
Filing: 1904-10-25
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Granted: 1905-06-20
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Expires: 1924-10-25
Abstract
No abstract record available.
Inventors
- 👤 Leamon G Souder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
B; B66; B66B; B66B21/00; B66B21/02; B66B21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1908-06-19 | 1908-12-19 | 1909-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-06-19 | 1912-12-19 | 1913-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-06-19 | 1916-12-19 | 1917-06-20 | $7700.00 | Window Closed / Lapsed |