US3694331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant beryllium bodies
Assignee: Materion Brush Inc
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Filing: 1970-03-06
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Granted: 1972-09-26
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Expires: 1990-03-06
Abstract
Abstract 1. A BERYLLIUM BODY HAVING AN ELECTROLTICALLY DEPOSITED CRYSTALLINE BERYLLIUM OXIDE COATING ADHERENT TO THE BODY SURFACE PRODUCED BY IMMERSING THE UNCOATED BODY IN A BATH CONSISTING ESSENTIALLY OF WATER, SODIUM CHROMATE IN AN AMOUNT AT LEAST 0.4%, BY WEIGHT, OF THE BATH, AND AN AMOUNT OF CHROMIC ACID SUFFICIENT TO ADJUST THE PH OF THE BATH INTO A RANGE FROM ABOUT 5.5 TO ABOUT 7.5, THE TEMPERATURE OF THE SAID BATH BEING BELOW ABOUT 130* F., AND PASSING AN ELECTRIC CURRENT TO THE SURFACE WITH THE SURFACE CONNECTED AS AN ANODE.
Inventors
- 👤 Louis J Csontos
- 👤 Albert James Stonehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:18
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A BERYLLIUM BODY HAVING AN ELECTROLTICALLY DEPOSITED CRYSTALLINE BERYLLIUM OXIDE COATING ADHERENT TO THE BODY SURFACE PRODUCED BY IMMERSING THE UNCOATED BODY IN A BATH CONSISTING ESSENTIALLY OF WATER, SODIUM CHROMATE IN AN AMOUNT AT LEAST 0.4%, BY WEIGHT, OF THE BATH, AND AN AMOUNT OF CHROMIC ACID SUFFICIENT TO ADJUST THE PH OF THE BATH INTO A RANGE FROM ABOUT 5.5 TO ABOUT 7.5, THE TEMPERATURE OF THE SAID BATH BEING BELOW ABOUT 130* F., AND PASSING AN ELECTRIC CURRENT TO THE SURFACE WITH THE SURFACE CONNECTED AS AN ANODE.
Claim 2
Dependent Claim
91 words
A BERYLLIUM BODY HAVING AN ELECTROLTICALLY DEPOSITED CRYSTALLINE BERYLLIUM OXIDE COATING ADHERENT TO THE BODY SURFACE PRODUCED BY IMMERSING THE UNCOATED BODY IN A BATH CONSISTING ESSENTIALLY OF WATER, SODIUM CHROMATE IN AN AMOUNT AT LEAST 0.4%, BY WEIGHT, OF THE BATH, AND AN AMOUNT OF CHROMIC ACID SUFFICIENT TO ADJUST THE PH OF THE BATH INTO A RANGE FROM ABOUT 5.5 TO ABOUT 7.5, THE TEMPERATURE OF THE SAID BATH BEING BELOW ABOUT 130* F., AND PASSING AN ELECTRIC CURRENT TO THE SURFACE WITH THE SURFACE CONNECTED AS AN ANODE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |