Patent US2561459A successfully refreshed from Google Patents.
US2561459A
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Assignee: Individual
•
Filing: 1949-04-25
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Granted: 1951-07-24
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Expires: 1969-04-25
Abstract
No abstract record available.
Inventors
- 👤 John B Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:12
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/282; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/948
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US346476A
Cited
US442642A
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US539917A
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US913712A
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US1093474A
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US1185772A
Cited
US2001290A
Cited
US2482391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |