US1466450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue blowing and testing device
Assignee: WILLIAM SCHLAFGE
•
Filing: 1920-01-02
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Granted: 1923-08-28
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Expires: 1940-01-02
Abstract
No abstract record available.
Inventors
- 👤 Charles A Kothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:45
CPC Classifications
F; F23; F23J; F23J3/00; F23J3/02; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7931; Y10T137/8376
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) | 1926-08-27 | 1927-02-26 | 1927-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-08-27 | 1931-02-26 | 1931-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-08-27 | 1935-02-26 | 1935-08-28 | $7700.00 | Window Closed / Lapsed |