Patent US2622414A successfully refreshed from Google Patents.
US2622414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N ven tor
Assignee: —
•
Filing: —
•
Granted: 1952-12-23
•
Expires: 1969-12-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0431; B01D2257/00; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/402; B01D2259/45; B01D2259/4508
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1626345A
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US1971518A
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US2084474A
Cited
US2097723A
Cited
US2077315A
Cited
US2175162A
Cited
US2339883A
Cited
US2354383A
Cited
US2337474A
Cited
US2460859A
Cited
US2503939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |