US1725541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reenforced concrete stair platform and the like
Assignee: Individual
•
Filing: 1928-03-28
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Granted: 1929-08-20
•
Expires: 1948-03-28
Abstract
No abstract record available.
Inventors
- 👤 Harvey W Schick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/104; E04F11/116; 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) | 1932-08-19 | 1933-02-18 | 1933-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-08-19 | 1937-02-18 | 1937-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-08-19 | 1941-02-18 | 1941-08-20 | $7700.00 | Window Closed / Lapsed |