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Patent US2539323A successfully refreshed from Google Patents.
US2539323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poittevin
Assignee: —
•
Filing: —
•
Granted: 1951-01-23
•
Expires: 1968-01-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:40
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/04; A61B6/0407; A61B6/0421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1933325A
Cited
US1130831A
Cited
US1235613A
Cited
AT114617B
Cited
CH151509A
Cited
US2103693A
Cited
US2177808A
Cited
US2111903A
Cited
US2329932A
Cited
US2264410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |