Patent US2539696A successfully refreshed from Google Patents.
US2539696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for
Assignee: —
•
Filing: —
•
Granted: 1951-01-30
•
Expires: 1968-01-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:27
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/02; A61L9/03; A61L2/00; A61L2/16; A61L2/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1864980A
Cited
US2472992A
Cited
US1403548A
Cited
US1421633A
Cited
US2207889A
Cited
US2472011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |