US1269724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke-purifier.
Assignee: Individual
•
Filing: 1916-08-15
•
Granted: 1918-06-18
•
Expires: 1936-08-15
Abstract
No abstract record available.
Inventors
- 👤 William W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:29
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1921-06-17 | 1921-12-17 | 1922-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-06-17 | 1925-12-17 | 1926-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-06-17 | 1929-12-17 | 1930-06-18 | $7700.00 | Window Closed / Lapsed |