US1099773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying gas.
Assignee: Individual
•
Filing: 1912-10-12
•
Granted: 1914-06-09
•
Expires: 1932-10-12
Abstract
No abstract record available.
Inventors
- 👤 Harry Ford Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:57
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; Y; Y10; Y10S; Y10S55/00; Y10S55/25
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) | 1917-06-08 | 1917-12-08 | 1918-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-06-08 | 1921-12-08 | 1922-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-06-08 | 1925-12-08 | 1926-06-09 | $7700.00 | Window Closed / Lapsed |