Patent US2689757A successfully refreshed from Google Patents.
US2689757A
Expired / Lapsed
US
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Multiple sash window fastener
Assignee: Individual
•
Filing: 1949-10-24
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Granted: 1954-09-21
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Expires: 1969-10-24
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:22
CPC Classifications
E; E05; E05F; E05F17/00; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/148; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR359039A
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US1212993A
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US1659103A
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US1758894A
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US1934290A
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US2158714A
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US2292133A
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US2313827A
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US2330533A
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US2486407A
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US2557670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |