US3256168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for changing charges of matter
Assignee: NEW ENGLAND INST FOR MEDICAL R
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Filing: 1963-06-21
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Granted: 1966-06-14
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 John H Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/002; B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0039
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE PROCESS FOR REDUCING THE SURFACE NEGATIVE ELECTRICAL CHARGES ON NON-LIVING PARTICLES OF MATTER DISPERSED IN A FLUID MEDIUM WHICH COMPRISES SUBJECTING SAID DISPERSED PARTICLES TO AN R-F FIELD HAVING A FREQUENCY SELECTED IN THE RANGE OF 5-50 MC./SEC. TO EFFECT A MAXIMUM REDUCTION IN THE ELECTROPHORETIC MOBILITY OF SAID PARTICLES, THE VOLTAGE OF SAID FIELD BEING LESS THAN THE VALUE REQUIRED TO PRODUCE IONIZATION IN THE FLUID DISPERSED PARTICLES.
Claim 2
Dependent Claim
70 words
THE PROCESS FOR REDUCING THE SURFACE NEGATIVE ELECTRICAL CHARGES ON NON-LIVING PARTICLES OF MATTER DISPERSED IN A FLUID MEDIUM WHICH COMPRISES SUBJECTING SAID DISPERSED PARTICLES TO AN R-F FIELD HAVING A FREQUENCY SELECTED IN THE RANGE OF 5-50 MC./SEC. TO EFFECT A MAXIMUM REDUCTION IN THE ELECTROPHORETIC MOBILITY OF SAID PARTICLES, THE VOLTAGE OF SAID FIELD BEING LESS THAN THE VALUE REQUIRED TO PRODUCE IONIZATION IN THE FLUID DISPERSED PARTICLES.
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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |