Patent US3545180A successfully refreshed from Google Patents.
US3545180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust collector and filter therefor
Assignee: Carter Day Co
•
Filing: 1968-08-26
•
Granted: 1970-12-08
•
Expires: 1988-08-26
Abstract
No abstract record available.
Inventors
- 👤 Maurice P Schrag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:48
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86268
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2247472A
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US2316526A
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US2970351A
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US3018503A
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US3222850A
Cited
US3147098A
Cited
US3303636A
Cited
US3233391A
Cited
US3306012A
Cited
US3377780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |