US1711238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-testing device
Assignee: FRED M HODGES
•
Filing: 1928-03-03
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Granted: 1929-04-30
•
Expires: 1948-03-03
Abstract
No abstract record available.
Inventors
- 👤 Ernest H Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:14
CPC Classifications
B; B60; B60S; B60S5/00; B60S5/04; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3662; Y10T137/3693; Y10T137/8158; Y10T137/8326
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) | 1932-04-29 | 1932-10-29 | 1933-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-04-29 | 1936-10-29 | 1937-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-04-29 | 1940-10-29 | 1941-04-30 | $7700.00 | Window Closed / Lapsed |