US2248158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curved tooth gear and pinion wheels
Assignee: Fairfield Manufacturing Co Inc
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Filing: 1939-12-20
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Granted: 1941-07-08
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Expires: 1959-12-20
Abstract
No abstract record available.
Inventors
- 👤 Francis H Boor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:00
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/002; B23F19/005; B23F9/00; B23F9/08; B23F9/10; F; F16; F16H; F16H55/00; F16H55/02; F16H55/08; F16H55/0806; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/103816; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19963; Y10T74/19972; Y10T74/19986
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) | 1944-07-07 | 1945-01-06 | 1945-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-07 | 1949-01-06 | 1949-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-07 | 1953-01-06 | 1953-07-08 | $7700.00 | Window Closed / Lapsed |