Patent US2825090A successfully refreshed from Google Patents.
US2825090A
Expired / Lapsed
US
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Sash balance coupling device
Assignee: Individual
•
Filing: 1955-03-21
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Granted: 1958-03-04
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Fred C Osten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:44
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/10; E05D13/12; E05D13/1207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1011734A
Cited
US1932906A
Cited
US2262990A
Cited
US2279600A
Cited
US2663896A
Cited
US2640222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |