Patent US1552569A successfully refreshed from Google Patents.
US1552569A
Expired / Lapsed
US
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Anchoring device for stair rails
Assignee: Individual
•
Filing: 1922-01-07
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Granted: 1925-09-08
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Expires: 1942-01-07
Abstract
No abstract record available.
Inventors
- 👤 Schurman John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1812; F; F16; F16B; F16B2200/00; F16B2200/40; F16B2200/403; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32041; Y10T403/32049; Y10T403/32254; Y10T403/32262
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) | 1928-09-07 | 1929-03-09 | 1929-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-09-07 | 1933-03-09 | 1933-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-09-07 | 1937-03-09 | 1937-09-08 | $7700.00 | Window Closed / Lapsed |