US3457804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterbalance for single-cylinder engines
Assignee: Briggs and Stratton Corp
•
Filing: 1967-09-06
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Granted: 1969-07-29
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Expires: 1987-09-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Harkness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F16; F16F; F16F15/00; F16F15/22; F16F15/26; F16F15/261; F02B75/02; F02B2075/022; F02B2075/027; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2183; Y10T74/2184
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |