Patent US2446979A successfully refreshed from Google Patents.
US2446979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Candle-filter mounting
Assignee: Industrial Rayon Corp
•
Filing: 1944-06-30
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Granted: 1948-08-10
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Expires: 1964-06-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Mclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:50
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1811795A
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US1755482A
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US1841492A
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US1937415A
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US2007336A
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US2076935A
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US1999913A
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US2097828A
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US2249928A
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US2322131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |