Patent US2903974A successfully refreshed from Google Patents.
US2903974A
Expired / Lapsed
US
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Motive power units for model railroads
Assignee: Individual
•
Filing: 1956-06-25
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Granted: 1959-09-15
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Robert M Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:45
CPC Classifications
A; A63; A63H; A63H19/00; A63H19/02; A63H19/10; A63H19/16; A63H19/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US379786A
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US393572A
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US430147A
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US691358A
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US946855A
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US1230625A
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US1411363A
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US1628185A
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US1867678A
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US2616115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |