US3483679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus
Assignee: Xerox Corp
•
Filing: 1967-01-03
•
Granted: 1969-12-16
•
Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Hans H Balbierer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1427; A47L9/1436; A47L9/1445; G; G03; G03G; G03G21/00; G03G21/10; Y; Y10; Y10S; Y10S55/00; Y10S55/02; Y10S55/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2079896A
Cited
US2218169A
Cited
US2590235A
Cited
US2721625A
Cited
US2864462A
Cited
US2805836A
Cited
US2804167A
Cited
US2752002A
Cited
US3047006A
Cited
US3252274A
Cited
US3238706A
Cited
US3260038A
Cited
US3197118A
Cited
GB1021076A
Cited
US3410060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |