US1291840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark-arrester.
Assignee: Individual
•
Filing: 1917-12-15
•
Granted: 1919-01-21
•
Expires: 1937-12-15
Abstract
No abstract record available.
Inventors
- 👤 Otto Gilford Gran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:25
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/12; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/311; B01F25/3111; Y; Y10; Y10S; Y10S55/00; Y10S55/20
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) | 1922-01-20 | 1922-07-22 | 1923-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-01-20 | 1926-07-22 | 1927-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-01-20 | 1930-07-22 | 1931-01-21 | $7700.00 | Window Closed / Lapsed |