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US1368618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical and chemical filter
Assignee: Individual
•
Filing: 1915-04-03
•
Granted: 1921-02-15
•
Expires: 1935-04-03
Abstract
No abstract record available.
Inventors
- 👤 Henry B Faber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/44; B01D33/46; B01D33/466; B01D33/06; B01D33/073; B01D33/09; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86863; Y10T137/86871
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) | 1924-02-15 | 1924-08-16 | 1925-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-02-15 | 1928-08-16 | 1929-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-02-15 | 1932-08-16 | 1933-02-15 | $7700.00 | Window Closed / Lapsed |