US1833943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operating apparatus
Assignee: ELECTRODOR Co
•
Filing: 1927-07-19
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Granted: 1931-12-01
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Expires: 1947-07-19
Abstract
No abstract record available.
Inventors
- 👤 Hill Glenn George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:29
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/616; E05F15/622; E05F17/00; E05F17/004; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19702; Y10T74/19805; Y10T74/19809; Y10T74/19814
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-11-30 | 1935-06-01 | 1935-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-30 | 1939-06-01 | 1939-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-30 | 1943-06-01 | 1943-12-01 | $7700.00 | Window Closed / Lapsed |