Patent US935808A successfully refreshed from Google Patents.
US935808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vent mechanism.
Assignee: Individual
•
Filing: 1908-04-28
•
Granted: 1909-10-05
•
Expires: 1928-04-28
Abstract
No abstract record available.
Inventors
- 👤 Michael L Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:28
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/081; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/3087; Y10T137/309; Y10T137/3099; Y10T137/7287; Y10T137/7358; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7921
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1912-10-04 | 1913-04-05 | 1913-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-10-04 | 1917-04-05 | 1917-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-10-04 | 1921-04-05 | 1921-10-05 | $7700.00 | Window Closed / Lapsed |