US2705321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percentage modulation system for proportional control
Assignee: WING ENGINEERING Corp
•
Filing: 1949-06-29
•
Granted: 1955-03-29
•
Expires: 1969-06-29
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Beck
- 👤 Warren A Schreiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:58
CPC Classifications
G; G08; G08C; G08C15/00; G08C15/02; G08C15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1559867A
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US1361522A
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US2256487A
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US2233183A
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US2262841A
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US2298409A
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US2400073A
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US2481516A
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US2490768A
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US2523703A
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US2515254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |