Patent US2222551A successfully refreshed from Google Patents.
US2222551A
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US
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Ratio varying device
Assignee: Askania Regulator Co
•
Filing: 1936-10-29
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Granted: 1940-11-19
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Expires: 1956-10-29
Abstract
No abstract record available.
Inventors
- 👤 Ziebolz Herbert
- 👤 Hubert J Velten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:09
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/02; G01F15/04; G06; G06G; G06G3/00; Y; Y10; Y10S; Y10S236/00; Y10S236/01; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/1987; Y10T137/2278; Y10T137/2322; Y10T137/2496; Y10T137/2499; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7786; Y10T137/7787; Y10T137/7788; Y10T74/00; Y10T74/20; Y10T74/20558; Y10T74/2057; Y10T74/22
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) | 1943-11-19 | 1944-05-20 | 1944-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-19 | 1948-05-20 | 1948-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-19 | 1952-05-20 | 1952-11-19 | $7700.00 | Window Closed / Lapsed |