US2565388A
Expired / Lapsed
US
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Assignee: MCCASKELL FILTERS Inc
•
Filing: 1945-06-15
•
Granted: 1951-08-21
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Expires: 1965-06-15
Abstract
No abstract record available.
Inventors
- 👤 Mary A Mccaskell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:25
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/80; B01D33/804; B01D33/806; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |