US2672170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically driven speed reducing power unit
Assignee: Individual
•
Filing: 1950-05-19
•
Granted: 1954-03-16
•
Expires: 1970-05-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:02
CPC Classifications
B; B27; B27C; B27C9/00; B27C9/02; Y; Y10; Y10T; Y10T408/00; Y10T408/31; Y10T83/00; Y10T83/768; Y10T83/7793; Y10T83/7797; Y10T83/7805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US741034A
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US1568328A
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US1716484A
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US1806528A
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US1883392A
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US2197207A
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US2154745A
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US2137921A
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US2242336A
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US2291999A
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US2284441A
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US2430798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |