US2919207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying a ferromagnetic surface to a base utilizing iron carbonyl and oxygen
Assignee: Individual
•
Filing: 1956-01-24
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Granted: 1959-12-29
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Expires: 1976-01-24
Abstract
No abstract record available.
Inventors
- 👤 Scholzel Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:38
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; G11B5/851; C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/406; C23C16/44; C23C16/54; C23C16/545
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF APPLYING A FEROMAGNETIC SURFACE COATING TO A NON-MAGNETIZABLE BASE SURFACE COMPRISING HEATING SAID NON-MAGNETIZABLE BASE SURFACE, AND CONTACTING SAID SURFACE WITH AN ATMOSPHERE COMPRISING VAPORS OF IRON PENTACARBONYLA AND OXYGEN, THE TEMPERATURE OF THE BASE SURFACE WHILE IN CONTACT WITH SAID ATMOSPHERE BEING ABOVE THE DECOMPOSITION TEMPERATURE OF THE CARBONYL COMPOUND, AND THE TIME OF CONTACT BEING SUCH AS TO DEPOSIT A THIN LAYER OF FERROMAGNETIC IRON OXIDE SUITABLE FOR MAGNETIC RECORDING ON SAID BASE SURFACE.
Claim 2
Independent Claim
79 words
THE METHOD OF APPLYING A FEROMAGNETIC SURFACE COATING TO A NON-MAGNETIZABLE BASE SURFACE COMPRISING HEATING SAID NON-MAGNETIZABLE BASE SURFACE, AND CONTACTING SAID SURFACE WITH AN ATMOSPHERE COMPRISING VAPORS OF IRON PENTACARBONYLA AND OXYGEN, THE TEMPERATURE OF THE BASE SURFACE WHILE IN CONTACT WITH SAID ATMOSPHERE BEING ABOVE THE DECOMPOSITION TEMPERATURE OF THE CARBONYL COMPOUND, AND THE TIME OF CONTACT BEING SUCH AS TO DEPOSIT A THIN LAYER OF FERROMAGNETIC IRON OXIDE SUITABLE FOR MAGNETIC RECORDING ON SAID BASE SURFACE.
References Cited (Backward Citations)
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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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |