US2951723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hold-open device
Assignee: Emhart Industries Inc
•
Filing: 1957-07-01
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Granted: 1960-09-06
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Benjamin S Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:19
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/32; E05C17/34; E05C17/345; Y; Y10; Y10S; Y10S16/00; Y10S16/17; Y10S292/00; Y10S292/60; Y10S411/00; Y10S411/955; Y10S411/974; Y10S411/975; Y10S411/984; Y10T; Y10T292/00; Y10T292/28; Y10T292/301; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32131; Y10T403/32147; Y10T403/32188; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |