US3246239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic generator for use in determining the electrostatic accumulation propertes of fibrous material and the like
Assignee: Zeneca Inc
•
Filing: 1962-01-16
•
Granted: 1966-04-12
•
Expires: 1982-01-16
Abstract
No abstract record available.
Inventors
- 👤 Robert A Olney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:15
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/36; G01N33/362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A DEVICE OF USE IN TESTING THE ELECTROSTATIC ACCUMULATION PROPERTIES OF A MATERIAL COMPRISING (A) A SUPPORT FRAME, (B) A METALLIC ELEMENT CONNECTED TO SAID SUPPORT FRAME WHICH INCLUDES MEANS FOR CONTAINING AND CONTACTING SAID MATERIAL, (C) MEANS CONNECTED TO SAID METALLIC ELEMENT FOR ELECTRICALLY GROUNDING SAID ELEMENT, (D) A RUBBING ASSEMBLY SUPPORTED BY SAID FRAME AND SPACED APART FROM SAID METALLIC ELEMENT, SAID ASSEMBLY INCLUDING A NON-CONDUCTIVE ELEMENT MADE OF A SUBSTANCE SEPARATED FROM SAID MATERIAL IN THE TRIBOELECTRIC SERIES AND A METALLIC CHARGE-COLLECTING ELEMENT, SAID NON-CONDUCTIVE ELEMENT AND SAID CHARGE-COLLECTING ELEMENT HAVING ADJACENT SURFACES ALIGNED IN SUBSTANTIALLY THE SAME PLANE AND HAVING AN INTERVENING GAP DISPOSED THEREBETWEEN, (E) MEANS CONNECTED TO SAID SUPPORT FRAME FOR MAINTAINING SAID SURFACES OF SAID NONCONDUCTIVE ELEMENT AND SAID CHARGE-COLLECTING ELEMENT OF SAID RUBBING ASSEMBLY IN CONTACT WITH AT LEAST A PORTION OF SAID MATERIAL, (F) MEANS FOR MOVING SAID RUBBING ASSEMBLY AND SAID FIRST METALLIC ELEMENT RELATIVE TO EACH OTHER TO PRODUCE AND ELECTROSTATIC CHARGE ON SAID MATERIAL, (G) AND MEANS CONNECTED TO SAID CHARGE-COLLECTING ELEMENT FOR CARRYING AN ELECTRIC CHARGE THEREFROM.
Claim 2
Independent Claim
180 words
A DEVICE OF USE IN TESTING THE ELECTROSTATIC ACCUMULATION PROPERTIES OF A MATERIAL COMPRISING (A) A SUPPORT FRAME, (B) A METALLIC ELEMENT CONNECTED TO SAID SUPPORT FRAME WHICH INCLUDES MEANS FOR CONTAINING AND CONTACTING SAID MATERIAL, (C) MEANS CONNECTED TO SAID METALLIC ELEMENT FOR ELECTRICALLY GROUNDING SAID ELEMENT, (D) A RUBBING ASSEMBLY SUPPORTED BY SAID FRAME AND SPACED APART FROM SAID METALLIC ELEMENT, SAID ASSEMBLY INCLUDING A NON-CONDUCTIVE ELEMENT MADE OF A SUBSTANCE SEPARATED FROM SAID MATERIAL IN THE TRIBOELECTRIC SERIES AND A METALLIC CHARGE-COLLECTING ELEMENT, SAID NON-CONDUCTIVE ELEMENT AND SAID CHARGE-COLLECTING ELEMENT HAVING ADJACENT SURFACES ALIGNED IN SUBSTANTIALLY THE SAME PLANE AND HAVING AN INTERVENING GAP DISPOSED THEREBETWEEN, (E) MEANS CONNECTED TO SAID SUPPORT FRAME FOR MAINTAINING SAID SURFACES OF SAID NONCONDUCTIVE ELEMENT AND SAID CHARGE-COLLECTING ELEMENT OF SAID RUBBING ASSEMBLY IN CONTACT WITH AT LEAST A PORTION OF SAID MATERIAL, (F) MEANS FOR MOVING SAID RUBBING ASSEMBLY AND SAID FIRST METALLIC ELEMENT RELATIVE TO EACH OTHER TO PRODUCE AND ELECTROSTATIC CHARGE ON SAID MATERIAL, (G) AND MEANS CONNECTED TO SAID CHARGE-COLLECTING ELEMENT FOR CARRYING AN ELECTRIC CHARGE THEREFROM.
References Cited (Backward Citations)
US2421430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |