Patent US2398997A successfully refreshed from Google Patents.
US2398997A
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Variable-speed gear transmission
Assignee: General Electric Co
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Filing: 1943-02-22
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Granted: 1946-04-23
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Expires: 1963-02-22
Abstract
No abstract record available.
Inventors
- 👤 Theodore M Berry
- 👤 Alfred H Canada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:36
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/12; F15B11/121; F16; F16H; F16H61/00; F16H61/02; F16H2708/00; F16H2708/10; Y; Y10; Y10S; Y10S60/00; Y10S60/911; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/1914; Y10T74/19219; Y10T74/19284; Y10T74/19293; Y10T74/19298; Y10T74/19326; Y10T74/20; Y10T74/20207; Y10T74/20238
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |