Patent US2777688A successfully refreshed from Google Patents.
US2777688A
Expired / Lapsed
US
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Window operating mechanism
Assignee: Individual
•
Filing: 1951-06-15
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Granted: 1957-01-15
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Expires: 1971-06-15
Abstract
No abstract record available.
Inventors
- 👤 Louis B Ehrlich
- 👤 Herbert I Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:37
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05F15/689; E05F15/697; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/55; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18792; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1049255A
Cited
US1839368A
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GB353096A
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DE596089C
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US2047329A
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US2186664A
Cited
US2336250A
Cited
US2324145A
Cited
GB544458A
Cited
US2331260A
Cited
US2593410A
Cited
US2684847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |