US3000752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating metallic sheet or strip material with powdered annealing separator substances
Assignee: Armco Inc
•
Filing: 1957-12-30
•
Granted: 1961-09-19
•
Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 John M Jackson
- 👤 Philip A Macklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:56
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; C; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C22; C22F; C22F1/00; C22F1/008; C23; C23C; C23C26/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS OF FORMING ON THE SURFACE OF METALLIC SHEET OR STRIP STOCK A COATING OF ANNEALING SEPARATOR IN DRY FORM AND DEVOID OF WATER OF CONSTITUTION WHICH COATING IS ADHERENT TO THE SAID SURFACE, WHICH COMPRISES CREATING BETWEEN THE SAID SURFACE AND AT LEAST ONE ELECTRODE SPACED THEREFROM AN ELECTROSTATIC FIELD BY APPLYING TO SAID ELECTRODE AN ELECTRICAL POTENTIAL SUFFICIENTLY POSITIVE WITH RESPECT TO THE POTENTIAL OF SAID SURFACE TO PRODUCE A POSITIVE CORONA ABOUT THE SAID ELECTRODE WITHOUT PRODUCING A NEGATIVE CORONA AT THE SAID SURFACE, AND INTRODUCING INTO THE SPACE BETWEEN THE SAID ELECTRODE AND THE SAID SURFACE AN ANNEALING SEPARATOR IN FINELY DIVIDED FORM ENTRAINED IN A DRY, NON-REACTIVE GAS, THE POSITION OF INTRODUCTION BEING CLOSER TO THE SAID SURFACE THAN TO THE SAID ELECTRODE AND OUTSIDE THE AREA OF THE SAID CORONA.
Claim 2
Dependent Claim
137 words
A PROCESS OF FORMING ON THE SURFACE OF METALLIC SHEET OR STRIP STOCK A COATING OF ANNEALING SEPARATOR IN DRY FORM AND DEVOID OF WATER OF CONSTITUTION WHICH COATING IS ADHERENT TO THE SAID SURFACE, WHICH COMPRISES CREATING BETWEEN THE SAID SURFACE AND AT LEAST ONE ELECTRODE SPACED THEREFROM AN ELECTROSTATIC FIELD BY APPLYING TO SAID ELECTRODE AN ELECTRICAL POTENTIAL SUFFICIENTLY POSITIVE WITH RESPECT TO THE POTENTIAL OF SAID SURFACE TO PRODUCE A POSITIVE CORONA ABOUT THE SAID ELECTRODE WITHOUT PRODUCING A NEGATIVE CORONA AT THE SAID SURFACE, AND INTRODUCING INTO THE SPACE BETWEEN THE SAID ELECTRODE AND THE SAID SURFACE AN ANNEALING SEPARATOR IN FINELY DIVIDED FORM ENTRAINED IN A DRY, NON-REACTIVE GAS, THE POSITION OF INTRODUCTION BEING CLOSER TO THE SAID SURFACE THAN TO THE SAID ELECTRODE AND OUTSIDE THE AREA OF THE SAID CORONA.
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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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |