US2932402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc type filter
Assignee: Denver Equipment Co
•
Filing: 1954-11-15
•
Granted: 1960-04-12
•
Expires: 1974-11-15
Abstract
No abstract record available.
Inventors
- 👤 Leland H Logne
- 👤 Arthur C Daman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:21
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/58; B01D33/68; D; D21; D21D; D21D5/00; D21D5/02; D21D5/04; D21D5/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1243630A
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US1212932A
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US1359578A
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US2079549A
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US2124983A
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US2202860A
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US2152455A
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US2312620A
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US2596082A
Cited
FR1055182A
Cited
US2699872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |