Patent US2612859A successfully refreshed from Google Patents.
US2612859A
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US
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Propelling and steering mechanism
Assignee: Individual
•
Filing: 1948-01-30
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Granted: 1952-10-07
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Expires: 1968-01-30
Abstract
No abstract record available.
Inventors
- 👤 Beryl I Billman
- 👤 Slack Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:26
CPC Classifications
B; B63; B63H; B63H16/00; B63H16/08; B63H16/12; B63H16/14; B63H2016/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US277667A
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US502866A
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GB189911359A
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US637051A
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US1133788A
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US1234929A
Cited
US1370959A
Cited
US1825240A
Cited
US1826507A
Cited
US1961506A
Cited
US2145586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |