Patent US954893A successfully refreshed from Google Patents.
US954893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stairway structure.
Assignee: Individual
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Filing: 1909-07-26
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Granted: 1910-04-12
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Expires: 1929-07-26
Abstract
No abstract record available.
Inventors
- 👤 William B Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:44
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/104; E04F11/112; E04F11/022; E04F11/025; E04F2011/0203; E04F2011/0205; E04F2011/0209
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) | 1913-04-11 | 1913-10-11 | 1914-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-04-11 | 1917-10-11 | 1918-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-04-11 | 1921-10-11 | 1922-04-12 | $7700.00 | Window Closed / Lapsed |