Patent US3517787A successfully refreshed from Google Patents.
US3517787A
Expired / Lapsed
US
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Sleet scraper for third rail assembly
Assignee: ThyssenKrupp Budd Co
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Filing: 1968-04-19
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Granted: 1970-06-30
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Expires: 1988-04-19
Abstract
No abstract record available.
Inventors
- 👤 Henry W Wessells
- 👤 Walter B Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:16
CPC Classifications
E; E01; E01H; E01H8/00; E01H8/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US700689A
Cited
US747177A
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US1450141A
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US1871239A
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US2769631A
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US3229798A
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US3436069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |