US2844497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying sulfide coating on wires for drawing and composition therefor
Assignee: Devex Corp
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Filing: 1956-12-07
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Granted: 1958-07-22
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Expires: 1976-12-07
Abstract
No abstract record available.
Inventors
- 👤 John A Henricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:28
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/40; C23C8/42; C21; C21D; C21D1/00; C21D1/68; C23C26/00; C23C26/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE METHOD OF REDUCING THE ABRASIVE NATURE OF THE MILL SCALE FORMED ON STEEL AT ELEVATED TEMPERATURES, COMPRISING THE STEPS OF PRECOATING THE FERROUS SURFACE WITH A FUSIBLE ALKALINE FILM CONTAINING SULFUR THAT WILL THERMALLY REACT WITH IRON TO FORM A FUSIBLE FERROUS FILM AND THEREAFTER ANNEALING THE STEEL.
Claim 2
Independent Claim
49 words
THE METHOD OF REDUCING THE ABRASIVE NATURE OF THE MILL SCALE FORMED ON STEEL AT ELEVATED TEMPERATURES, COMPRISING THE STEPS OF PRECOATING THE FERROUS SURFACE WITH A FUSIBLE ALKALINE FILM CONTAINING SULFUR THAT WILL THERMALLY REACT WITH IRON TO FORM A FUSIBLE FERROUS FILM AND THEREAFTER ANNEALING THE STEEL.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |