US3072547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern forming method and apparatus
Assignee: International Business Machines Corp
•
Filing: 1960-07-11
•
Granted: 1963-01-08
•
Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 Floyd W Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:39
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
A METHOD FOR FORMING PERMANENT TIMING TRACKS UPON A MAGNETIZABLE SURFACE WHICH COMPRISES: RECORDING A TIMING TRACK UPON SAID MAGNETIZABLE SURFACE IN THE FORM OF MAGNETIZED SPOTS; COATING SAID MAGNETIZABLE SURFACE WITH A PHOTORESIST; READING SAID MAGNETIZED SPOTS TO DEVELOP A SERIES OF ELECTRICAL IMPULSES; EXPOSING DIS CRETE AREAS OF SAID COATED MAGNETIZABLE SURFACE WITH LIGHT IMPULSES GENERATED BY AN ARC LAMP IMPULSED BY THE ELECTRICAL IMPULSES GENERATED DURING THE READING OF SAID MAGNETIZED SPOTS, SAID LIGHT IMPULSES BEING DIRECTED ONTO SAID COATED SURFACE THROUGH A TIMING TRACK DEFINING APERTURE OF A MEMBER IN JUXTAPOSITION WITH SAID COATED MAGNETIZABLE SURFACE; DEVELOPING SAID EXPOSED COATED SURFACE, THEREBY FORMING UPON SAID MAGNETIZABLE SURFACE A PROTECTIVE COATING COVERING DISCRETE SURFACE AREAS LEAVING OTHER AREAS UNPROTECTED; AND REMOVING THE MAGNETIZABLE SURFACE IN THE UNPROTECTED AREAS.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |