Patent US1680032A successfully refreshed from Google Patents.
US1680032A
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US
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Metal step
Assignee: T Z RAILWAY EQUIPMENT CO
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Filing: 1927-04-25
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Granted: 1928-08-07
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Expires: 1947-04-25
Abstract
No abstract record available.
Inventors
- 👤 Harry T Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:16
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/104; E04F11/112; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12368
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) | 1931-08-07 | 1932-02-06 | 1932-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-07 | 1936-02-06 | 1936-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-07 | 1940-02-06 | 1940-08-07 | $7700.00 | Window Closed / Lapsed |