US3494113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter assembly and sub-assemblies
Assignee: MICROTRON CORP
•
Filing: 1968-05-22
•
Granted: 1970-02-10
•
Expires: 1988-05-22
Abstract
No abstract record available.
Inventors
- 👤 William L Kinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:09
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/0002; B01D46/0005; B01D46/10; B01D2279/00; B01D2279/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3177637A
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US3222850A
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US3222848A
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US3246457A
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US3144315A
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US3247652A
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US3258900A
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US3411273A
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US3392846A
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US3360910A
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US3375640A
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US3423908A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |