US2724258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-exit lock
Assignee: Emhart Industries Inc
•
Filing: 1950-09-21
•
Granted: 1955-11-22
•
Expires: 1970-09-21
Abstract
No abstract record available.
Inventors
- 👤 Frank J Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/10; E05B65/1046; E05B65/106; E05B65/1066; E05B65/1093; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5159; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/5496
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US95507A
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US431620A
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US464805A
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US1357007A
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US1500168A
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US1528515A
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GB232079A
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AT157551B
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US2582924A
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US2603963A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |