Patent US3487721A successfully refreshed from Google Patents.
US3487721A
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US
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Driving system for a tanker
Assignee: Lohmann and Stolterfoht GmbH
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Filing: 1968-06-03
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Granted: 1970-01-06
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Expires: 1988-06-03
Abstract
No abstract record available.
Inventors
- 👤 Walter Burkhardt
- 👤 Heinz M Hiersig
- 👤 Karl-Heinz Siefert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:17
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/02; B63H23/10; B63H23/30; B63J; B63J3/00; B63J3/02; B63J2003/001; B63J2003/006; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19014; Y10T74/19019; Y10T74/19023; Y10T74/19126; Y10T74/19135
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) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |