US3232787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable magnetic film and method for making same
Assignee: Individual
•
Filing: 1961-05-08
•
Granted: 1966-02-01
•
Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:12
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14; H01F41/00; H01F41/14; H01F41/22; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49034; Y10T29/49036; Y10T29/49043
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
THE METHOD OF MAKING A BISTABLE MAGNETIC FILM TO IMPART AN EASY AND A HARD DIRECTION OF MAGNETIZATION IN THE PLANE OF THE FILM COMPRISING THE STEPS OF PREPARING A SUBSTRATE SURFACE OF MATERIAL EXHIBITING ANISOTROPIC COEFFICIENTS OF THERMAL EXPANSION IN TWO DIRECTIONS ON THE SURFACE OF SAID SUBSTRATE CORRESPONDING TO SAID EASY AND HARD DIRECTIONS OF MAGNETIZATION, AND DEPOSITING A MAGNETIC FILM EXHIBITING AN ISOTROPIC COEFFICIENT OF THERMAL EXPANSION ON SAID SURFACE THEREBY ESTABLISHING SAID EASY AND HARD DIRECTIONS OF MAGNETIZATION IN AN ORDERED DIRECTION.
References Cited (Backward Citations)
CA564177A
Cited
US2392429A
Cited
US2671034A
Cited
GB751843A
Cited
US2853402A
Cited
GB845604A
Cited
US2999766A
Cited
US3092511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |