US1446648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-tube post
Assignee: Individual
•
Filing: 1921-09-20
•
Granted: 1923-02-27
•
Expires: 1941-09-20
Abstract
No abstract record available.
Inventors
- 👤 Kostlan Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:47
CPC Classifications
B; B60; B60S; B60S5/00; B60S5/04; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6918; Y10T137/6932; Y10T137/6943; Y10T137/6951
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) | 1926-02-26 | 1926-08-28 | 1927-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-02-26 | 1930-08-28 | 1931-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-02-26 | 1934-08-28 | 1935-02-27 | $7700.00 | Window Closed / Lapsed |