Patent US2569624A successfully refreshed from Google Patents.
US2569624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double door operating mechanism
Assignee: Individual
•
Filing: 1947-02-07
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Granted: 1951-10-02
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Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 Stanley M Wychowaniec
- 👤 Lasis Alex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:20
CPC Classifications
E; E05; E05F; E05F17/00; E05F17/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1138715A
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US1296251A
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US1476174A
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US2010647A
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US1885084A
Cited
US1941969A
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US2078308A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |