US3372530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: ANTIPOL CORP
•
Filing: 1966-03-21
•
Granted: 1968-03-12
•
Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Walter H Zimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:33
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB191023921A
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US1966280A
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US2152251A
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US2217130A
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US2684836A
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US3009687A
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US3034771A
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US3131237A
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US3057605A
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US3141910A
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US3181287A
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US3228667A
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FR1361725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |