Patent US1550907A successfully refreshed from Google Patents.
Patent US4421888A successfully refreshed from Google Patents.
Patent US2453965A successfully refreshed from Google Patents.
Patent US3478843A successfully refreshed from Google Patents.
Patent US2260238A successfully refreshed from Google Patents.
US2260238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tie plate arrangement for railroads
Assignee: Individual
•
Filing: 1939-02-03
•
Granted: 1941-10-21
•
Expires: 1959-02-03
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Stedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:40
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/02; E01B9/28; E01B9/04; E01B9/14; E01B9/18; E01B9/68; E01B9/681; E01B9/683; E01B9/685; E01B9/686
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1944-10-20 | 1945-04-21 | 1945-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-10-20 | 1949-04-21 | 1949-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-10-20 | 1953-04-21 | 1953-10-21 | $7700.00 | Window Closed / Lapsed |