US3448522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for indicating a superelevation of a track
Assignee: Franz Plasser Bahnbaumaschinen Industrie GmbH
•
Filing: 1967-03-21
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Granted: 1969-06-10
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Expires: 1987-03-21
Abstract
No abstract record available.
Inventors
- 👤 Franz Plasser
- 👤 Josef Theurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:10
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/02; G01C9/04; E; E01; E01B; E01B35/00; E01B35/02; G01C9/06; G01C9/12; E01B2203/00; E01B2203/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA687029A
Cited
US2120771A
Cited
US2488792A
Cited
US2745087A
Cited
US2772411A
Cited
FR1230329A
Cited
US3111908A
Cited
US3295219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |