Patent US2490080A successfully refreshed from Google Patents.
US2490080A
Expired / Lapsed
US
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Contacting apparatus
Assignee: Individual
•
Filing: 1944-05-19
•
Granted: 1949-12-06
•
Expires: 1964-05-19
Abstract
No abstract record available.
Inventors
- 👤 Francis L Melvill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:19
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/008; B01D53/00; B01D53/14; B01D53/18; B01D53/185; Y; Y10; Y10S; Y10S261/00; Y10S261/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1113643A
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US2042127A
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GB427087A
Cited
US2047444A
Cited
US2143877A
Cited
US2198305A
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US2290162A
Cited
US2376341A
Cited
US2369913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |