US2490079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacting apparatus
Assignee: Individual
•
Filing: 1944-04-18
•
Granted: 1949-12-06
•
Expires: 1964-04-18
Abstract
No abstract record available.
Inventors
- 👤 Francis L Melvill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:43
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/32; F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; Y; Y10; Y10S; Y10S261/00; Y10S261/11; Y10S261/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US405064A
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US980602A
Cited
GB191225349A
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DE326985C
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GB147213A
Cited
DE321768C
Cited
US1804132A
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DE576026C
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GB427087A
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US2133450A
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 |