Patent US3454394A successfully refreshed from Google Patents.
US3454394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular arc gear for smoothly transmitting power
Assignee: Hitachi Ltd
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Filing: 1967-09-01
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Granted: 1969-07-08
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Expires: 1987-09-01
Abstract
No abstract record available.
Inventors
- 👤 Makoto Honobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:24
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/08; F16H55/0886; F16H2055/0893; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19958; Y10T74/19963; Y10T74/19972
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |