Patent FR1213598A successfully refreshed from Google Patents.
US3075227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: Individual
•
Filing: 1960-04-14
•
Granted: 1963-01-29
•
Expires: 1980-04-14
Abstract
No abstract record available.
Inventors
- 👤 Romald E Bowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/28; Y; Y10; Y10S; Y10S116/00; Y10S116/18; Y10T; Y10T137/00; Y10T137/206; Y10T137/2087; Y10T137/2109; Y10T137/2115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A VORTEX DEVICE, COMPRISING MEANS FOR ESTABLISHING A FLUID FLOW SUBSISTING IN A DIRECTION PERPENDICULAR TO A PREDETERMINED PLANE, AND MEANS FOR IMPARTING VORTICAL FLOW TO SAID FLUID WHILE MAINTAINING SAID VORTICAL FLOW SUBSTANTIALLY ENTIRELY IN SAID PLANE, SAID LAST MEANS INCLUDING A HOLLOW CYLINDER HAVING A RELATIVELY LARGE DIAMETER AND A HEIGHT NOT GREATER THAN ONE-FIFTH SAID DIAMETER, SAID PREDETERMINED PLANE SUBSISTING WITHIN SAID CYLINDER AND PERPENDICULAR TO THE AXIS THEREOF.
Claim 2
Dependent Claim
72 words
A VORTEX DEVICE, COMPRISING MEANS FOR ESTABLISHING A FLUID FLOW SUBSISTING IN A DIRECTION PERPENDICULAR TO A PREDETERMINED PLANE, AND MEANS FOR IMPARTING VORTICAL FLOW TO SAID FLUID WHILE MAINTAINING SAID VORTICAL FLOW SUBSTANTIALLY ENTIRELY IN SAID PLANE, SAID LAST MEANS INCLUDING A HOLLOW CYLINDER HAVING A RELATIVELY LARGE DIAMETER AND A HEIGHT NOT GREATER THAN ONE-FIFTH SAID DIAMETER, SAID PREDETERMINED PLANE SUBSISTING WITHIN SAID CYLINDER AND PERPENDICULAR TO THE AXIS THEREOF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |