Patent US2511871A successfully refreshed from Google Patents.
US2511871A
Expired / Lapsed
US
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Assignee: —
•
Filing: —
•
Granted: 1950-06-20
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Expires: 1967-06-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:09
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; A; A61; A61G; A61G17/00; A61G17/007; A61G17/0136; A61G17/02; A61G17/0076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US210210A
Cited
US228836A
Cited
US1421018A
Cited
US1327442A
Cited
US1599436A
Cited
US1523699A
Cited
US2375386A
Cited
US2431183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |