Patent US4060127A successfully refreshed from Google Patents.
Patent US3466853A successfully refreshed from Google Patents.
US3466853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner for internal combustion engines
Assignee: Siemens AG
•
Filing: 1967-12-06
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Granted: 1969-09-16
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Expires: 1987-12-06
Abstract
No abstract record available.
Inventors
- 👤 Kurt Buick
- 👤 Heinrich Klein
- 👤 Eduard Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:03
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/022; B; B04; B04C; B04C5/00; B04C5/24; B04C5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1717639A
Cited
US2069483A
Cited
US2494465A
Cited
US2638219A
Cited
US2804171A
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US2756878A
Cited
US2963109A
Cited
US2911066A
Cited
US3199269A
Cited
GB933936A
Cited
US3199270A
Cited
US3232430A
Cited
US3165390A
Cited
US3266165A
Cited
US3358844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |