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US3373545A
Expired / Lapsed
US
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Dust collecting system
Assignee: Individual
•
Filing: 1966-04-11
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Granted: 1968-03-19
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Expires: 1986-04-11
Abstract
No abstract record available.
Inventors
- 👤 Lynn M Christianson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:01
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/48; B01D46/66; B01D46/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US513123A
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US1349480A
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US1784339A
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US1849649A
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US2125574A
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US2473501A
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US2534600A
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US3097936A
Cited
US3224172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |