US911175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for automatically opening the doors of public buildings.
Assignee: Individual
•
Filing: 1908-04-14
•
Granted: 1909-02-02
•
Expires: 1928-04-14
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Stevenson
- 👤 Isaac E Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:23
CPC Classifications
E; E05; E05F; E05F13/00; E05F13/04; Y; Y10; Y10S; Y10S292/00; Y10S292/12; Y10S292/72; Y10T; Y10T292/00; Y10T292/08; Y10T292/0908; Y10T292/091
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) | 1912-02-02 | 1912-08-03 | 1913-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-02-02 | 1916-08-03 | 1917-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-02-02 | 1920-08-03 | 1921-02-02 | $7700.00 | Window Closed / Lapsed |