Patent US3415237A successfully refreshed from Google Patents.
US3415237A
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US
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Internal combustion engine and balancing means therefor
Assignee: Briggs and Stratton Corp
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Filing: 1967-02-14
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Granted: 1968-12-10
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Expires: 1987-02-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Harkness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:02
CPC Classifications
F; F02; F02B; F02B67/00; F02B67/04; F02B75/00; F02B75/16; F16; F16F; F16F15/00; F16F15/22; F16F15/26; F16F15/264; 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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |