Patent US2674451A successfully refreshed from Google Patents.
US2674451A
Expired / Lapsed
US
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Window sash operating mechanism
Assignee: Individual
•
Filing: 1950-06-05
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Granted: 1954-04-06
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Expires: 1970-06-05
Abstract
No abstract record available.
Inventors
- 👤 Michael J Tracy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:09
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/50; E06B3/5009; E06B3/5018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US926094A
Cited
US1101257A
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US1647262A
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US1659103A
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US2327246A
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US2293944A
Cited
US2267140A
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US2442363A
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US2519234A
Cited
US2478044A
Cited
US2528953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |