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US2443824A
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Assignee: Individual
•
Filing: 1945-11-28
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Granted: 1948-06-22
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Expires: 1965-11-28
Abstract
No abstract record available.
Inventors
- 👤 Ernest B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:32
CPC Classifications
B; B25; B25B; B25B1/00; B25B1/24; B25B1/2405; B25B1/2457; B25B27/00; B25B27/0085; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53143; Y10T29/53265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US445506A
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US549354A
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US1124568A
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US1155288A
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US1527162A
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US1707947A
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GB391124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |