Patent US341142A successfully refreshed from Google Patents.
Patent US3434267A successfully refreshed from Google Patents.
US3434267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying air
Assignee: Messen-Jaschin GA
•
Filing: 1965-09-01
•
Granted: 1969-03-25
•
Expires: 1985-09-01
Abstract
No abstract record available.
Inventors
- 👤 Gregori Messen-Jaschin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:46
CPC Classifications
E; E01; E01C; E01C1/00; E01C1/005; B; B03; B03C; B03C3/00; B03C3/019
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US334158A
Cited
US820945A
Cited
US697369A
Cited
US802647A
Cited
US795772A
Cited
US855409A
Cited
US950332A
Cited
US1224448A
Cited
US1728493A
Cited
US2285387A
Cited
US2415471A
Cited
US2604023A
Cited
US2672206A
Cited
US2719705A
Cited
US2793707A
Cited
US2937712A
Cited
US3146072A
Cited
US3157479A
Cited
US3233391A
Cited
US3299620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |