US1264221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-mixing device.
Assignee: Individual
•
Filing: 1917-03-13
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Granted: 1918-04-30
•
Expires: 1937-03-13
Abstract
No abstract record available.
Inventors
- 👤 John A Stransky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:27
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/04; F16K15/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T137/7897; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/794; Y10T137/8122; Y10T137/8593; Y10T137/87153
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) | 1921-04-29 | 1921-10-29 | 1922-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-04-29 | 1925-10-29 | 1926-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-04-29 | 1929-10-29 | 1930-04-30 | $7700.00 | Window Closed / Lapsed |