Patent US2903736A successfully refreshed from Google Patents.
US2903736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically-locking sash balance for removable sash windows
Assignee: Individual
•
Filing: 1956-09-24
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Granted: 1959-09-15
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Sr Fred C Osten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:18
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/10; E05D13/12; E05D13/1207; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734235A
Cited
US2631336A
Cited
US2747219A
Cited
US2791795A
Cited
US2772449A
Cited
US2796630A
Cited
US2778067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |