Patent US2424248A successfully refreshed from Google Patents.
US2424248A
Expired / Lapsed
US
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Contacting apparatus
Assignee: Individual
•
Filing: 1944-03-29
•
Granted: 1947-07-22
•
Expires: 1964-03-29
Abstract
No abstract record available.
Inventors
- 👤 Francis L Melvill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:44
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; F28F25/08; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/121; B01J19/32; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32282; Y; Y10; Y10S; Y10S261/00; Y10S261/72
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) | 1950-07-21 | 1951-01-20 | 1951-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-21 | 1955-01-20 | 1955-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-21 | 1959-01-20 | 1959-07-22 | $7700.00 | Window Closed / Lapsed |