US2841390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating system for multi-leaf doors
Assignee: BYRNE DOORS Inc
•
Filing: 1953-10-12
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Granted: 1958-07-01
•
Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 Thornton L Urquhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:28
CPC Classifications
E; E05; E05F; E05F17/00; B; B63; B63B; B63B19/00; B63B19/12; B63B19/14; B63B19/18; E05Y; E05Y2800/00; E05Y2800/10; E05Y2800/122; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; E05Y2900/50; E05Y2900/514
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1244899A
Cited
US1838491A
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US1960860A
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US2373023A
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US2425016A
Cited
US2553511A
Cited
US2628090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |