Patent US502089A successfully refreshed from Google Patents.
US3473301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter assemblies for internal combustion engines
Assignee: Motors Liquidation Co
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Filing: 1967-11-13
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Granted: 1969-10-21
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Ernest Buckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:56
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB894235A
Cited
FR1147736A
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US3003637A
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US2954091A
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US3076555A
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GB926698A
Cited
US3190058A
Cited
US3235633A
Cited
FR1358644A
Cited
US3385038A
Cited
US3277876A
Cited
US3355863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |