US2550918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Escalator rail guard
Assignee: Sears Roebuck and Co
•
Filing: 1946-09-27
•
Granted: 1951-05-01
•
Expires: 1966-09-27
Abstract
No abstract record available.
Inventors
- 👤 Felix Otto
- 👤 George L Meyers
- 👤 Earl D Boisselier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:46
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; E04F11/1836
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1628090A
Cited
US2080980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |