Patent US2445440A successfully refreshed from Google Patents.
US2445440A
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US
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Assignee: Individual
•
Filing: 1945-01-20
•
Granted: 1948-07-20
•
Expires: 1965-01-20
Abstract
No abstract record available.
Inventors
- 👤 William F Klemm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:18
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/40; B42F13/404; Y; Y10; Y10T; Y10T83/00; Y10T83/748; Y10T83/7593; Y10T83/7667; Y10T83/7673; Y10T83/869; Y10T83/8717; Y10T83/8752
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) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |