US2639003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of assembling an air filter panel
Assignee: Individual
•
Filing: 1947-05-19
•
Granted: 1953-05-19
•
Expires: 1967-05-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:50
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S55/00; Y10S55/31; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49892
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1566607A
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FR483770A
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FR492235A
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US1450951A
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US1560790A
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US1598097A
Cited
US1841347A
Cited
GB352960A
Cited
GB369400A
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US1886671A
Cited
US2138874A
Cited
US2334263A
Cited
US2405716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |