Patent US3546887A successfully refreshed from Google Patents.
US3546887A
Expired / Lapsed
US
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Railroad cable laying apparatus
Assignee: Henkels and McCoy Inc
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Filing: 1968-10-09
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Granted: 1970-12-15
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Expires: 1988-10-09
Abstract
No abstract record available.
Inventors
- 👤 Martin F Helmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/10; E02F5/102; E02F5/103; F; F16; F16L; F16L1/00; F16L1/024; F16L1/028; F16L1/032; H; H02; H02G; H02G1/00; H02G1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |