US2698745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: HOWARD EARL
•
Filing: 1950-12-26
•
Granted: 1955-01-04
•
Expires: 1970-12-26
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Boucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:57
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; B01D47/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189623595A
Cited
US1051017A
Cited
US1049317A
Cited
US1273791A
Cited
US1415294A
Cited
US1690813A
Cited
AT126226B
Cited
FR786506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |