Patent US2774248A successfully refreshed from Google Patents.
US2774248A
Expired / Lapsed
US
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Multiple speed drive system
Assignee: Individual
•
Filing: 1953-05-07
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Granted: 1956-12-18
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Expires: 1973-05-07
Abstract
No abstract record available.
Inventors
- 👤 Moss Albert H De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:40
CPC Classifications
D; D06; D06F; D06F33/00; D06F33/04; D06F33/06; F; F16; F16H; F16H9/00; F16H9/02; F16H9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1843523A
Cited
US1909420A
Cited
US2316131A
Cited
US2337586A
Cited
US2452008A
Cited
US2538667A
Cited
US2568134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |