US3183647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lang cleaning filter surfaces
Assignee: —
•
Filing: —
•
Granted: 1965-05-18
•
Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:40
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/66; B01D46/70; B01D46/24; B01D46/2403; B01D46/2411; B01D46/68; B01D46/681; B01D46/71; B01D2273/00; B01D2273/28; B01D2279/00; B01D2279/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE METHOD OF CLEANING CIRCULAR PLANAR FILTER SURFACES; COMPRISING ARRANGING SAID SURFACES IN SPACED RELATION IN COMMON PLANE, CAUSING EACH SURFACE TO ROTATE ABOUT ITS CENTER POINT, AND ROTATION A SECTION NOZZLE THROUGH COMPLETE CYCLES OF ROTATION SO THAT IT SCANS A PART OF ALL THE FILLER SURFACES DURING EACH CYCLE OF ROTATION.
Claim 2
Independent Claim
53 words
THE METHOD OF CLEANING CIRCULAR PLANAR FILTER SURFACES; COMPRISING ARRANGING SAID SURFACES IN SPACED RELATION IN COMMON PLANE, CAUSING EACH SURFACE TO ROTATE ABOUT ITS CENTER POINT, AND ROTATION A SECTION NOZZLE THROUGH COMPLETE CYCLES OF ROTATION SO THAT IT SCANS A PART OF ALL THE FILLER SURFACES DURING EACH CYCLE OF ROTATION.
References Cited (Backward Citations)
GB353837A
Cited
US1995648A
Cited
US2516680A
Cited
US2795291A
Cited
US2792074A
Cited
DE1022887B
Cited
DE1063915B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |