US2545680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Witt h
Assignee: —
•
Filing: —
•
Granted: 1951-03-20
•
Expires: 1968-03-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:31
CPC Classifications
F; F24; F24B; F24B5/00; F24B5/02; F24B5/04; F23; F23B; F23B1/00; F23B50/00; F23B50/02; F23B80/00; F23B80/04; F24B1/00; F24B1/02; F24B13/00; F24B13/04; F24B5/021; F24B5/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE38896C
Cited
US345564A
Cited
US603113A
Cited
US759318A
Cited
US1833888A
Cited
US1915132A
Cited
DE639686C
Cited
US2160481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |