Patent US1493789A successfully refreshed from Google Patents.
US1493789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaner
Assignee: Individual
•
Filing: 1921-11-30
•
Granted: 1924-05-13
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Expires: 1941-11-30
Abstract
No abstract record available.
Inventors
- 👤 Benjamin J Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:15
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/02; C10K1/024; Y; Y10; Y10S; Y10S15/00; Y10S15/08
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) | 1927-05-13 | 1927-11-12 | 1928-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-05-13 | 1931-11-12 | 1932-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-05-13 | 1935-11-12 | 1936-05-13 | $7700.00 | Window Closed / Lapsed |