US3320523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for visibly indicating and recording magnetic fields
Assignee: Individual
•
Filing: 1965-02-01
•
Granted: 1967-05-16
•
Expires: 1985-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lyne S Trimble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:48
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/10; G11; G11B; G11B5/00; G11B5/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
THE METHOD OF CREATING A VISIBLE PATTERN ACCURATELY PORTRAYING THE EXISTENCE OF A MAGNETIC FIELD, WHICH COMPRISES THE STEPS OF: (A) FORMING TINY PARTICLES OF MAGNETIC MATERIALS IN THE SIZE RANGE ONE-TENTH MICRON TO FIVE MICRONS; (B) FORMING A WATER PHASE SOLUTION BY MIXING THE TINY PARTICLES IN THE RATIO OF 8 PARTS BY WEIGHT WITH 75 PARTS BY WEIGHT OF GLYCERIN AND 17 PARTS BY WEIGHT OF SUCROSE; (C) DISPERSING THE PARTICLES IN THE WATER PHASE SOLUTION TO RENDER THE PARTICLES THOROUGHLY WET BY THE WATER PHASE; (D) FORMING A SUSPENSION OF WATER PHASE DROPLETS BY STIRRING 20 PARTS BY WEIGHT OF THE WATER PHASE WITH 80 PARTS BY WEIGHT OF ACRYLIC CO-POLYMER PHASE; (E) COATING A SUPPORTING MEDIUM WITH A RESIN CONTAINING THE WATER PHASE DROPLETS TO FORM A FILM OF APPROXIMATELY 15 MICRONS IN THICKNESS; (F) PRE-ALIGNING THE POSITION OF THE TINY PARTICLES BY SUBJECTING THE MEDIUM AND RESIN COATING TO A TRANSVERSE MAGNETIC FIELD IN EXCESS OF 1,000 OERSTEDS; AND (G) SUBJECTING THE FILM COATING TO A MAGNETIC FIELD.
Claim 2
Independent Claim
173 words
THE METHOD OF CREATING A VISIBLE PATTERN ACCURATELY PORTRAYING THE EXISTENCE OF A MAGNETIC FIELD, WHICH COMPRISES THE STEPS OF: (A) FORMING TINY PARTICLES OF MAGNETIC MATERIALS IN THE SIZE RANGE ONE-TENTH MICRON TO FIVE MICRONS; (B) FORMING A WATER PHASE SOLUTION BY MIXING THE TINY PARTICLES IN THE RATIO OF 8 PARTS BY WEIGHT WITH 75 PARTS BY WEIGHT OF GLYCERIN AND 17 PARTS BY WEIGHT OF SUCROSE; (C) DISPERSING THE PARTICLES IN THE WATER PHASE SOLUTION TO RENDER THE PARTICLES THOROUGHLY WET BY THE WATER PHASE; (D) FORMING A SUSPENSION OF WATER PHASE DROPLETS BY STIRRING 20 PARTS BY WEIGHT OF THE WATER PHASE WITH 80 PARTS BY WEIGHT OF ACRYLIC CO-POLYMER PHASE; (E) COATING A SUPPORTING MEDIUM WITH A RESIN CONTAINING THE WATER PHASE DROPLETS TO FORM A FILM OF APPROXIMATELY 15 MICRONS IN THICKNESS; (F) PRE-ALIGNING THE POSITION OF THE TINY PARTICLES BY SUBJECTING THE MEDIUM AND RESIN COATING TO A TRANSVERSE MAGNETIC FIELD IN EXCESS OF 1,000 OERSTEDS; AND (G) SUBJECTING THE FILM COATING TO A MAGNETIC FIELD.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |