US935475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door-opening apparatus.
Assignee: Individual
•
Filing: 1908-09-17
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Granted: 1909-09-28
•
Expires: 1928-09-17
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Effenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:18
CPC Classifications
E; E05; E05F; E05F17/00; E05F17/004; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106; Y; Y10; Y10S; Y10S292/00; Y10S292/12
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) | 1912-09-27 | 1913-03-29 | 1913-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-09-27 | 1917-03-29 | 1917-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-09-27 | 1921-03-29 | 1921-09-28 | $7700.00 | Window Closed / Lapsed |