US3482378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling purge head dust filter
Assignee: Air O Matics Inc
•
Filing: 1968-05-15
•
Granted: 1969-12-09
•
Expires: 1988-05-15
Abstract
No abstract record available.
Inventors
- 👤 Richard D Noland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/66; B01D46/70; B01D46/71; B01D46/02; B01D46/04; B01D46/42; B01D46/4272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2765048A
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US2776024A
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US2867289A
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US3018503A
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US3209521A
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US3164455A
Cited
US3303636A
Cited
GB1077718A
Cited
US3277633A
Cited
US3306012A
Cited
US3385033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |