Patent US2581022A successfully refreshed from Google Patents.
US2581022A
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US
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Assignee: Individual
•
Filing: 1946-10-22
•
Granted: 1952-01-01
•
Expires: 1966-10-22
Abstract
No abstract record available.
Inventors
- 👤 Japikse Bertrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:08
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/02; B; B30; B30B; B30B15/00; B30B15/04; B30B15/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US324367A
Cited
US1653030A
Cited
US1961310A
Cited
US1910534A
Cited
US1959865A
Cited
US2104299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |