US3824134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliding process
Assignee: Cooper Industries LLC
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Filing: 1971-10-12
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Granted: 1974-07-16
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Expires: 1991-10-12
Abstract
Abstract THE DISCLOSURE TEACHES NOVEL COPPER BASE ALLOYS HAVING IMPROVED TOUGHNESS AND OUTSTANDING RESISTANCE TO STRESS CORROSION. THE COPPER ALLOYS CONTAIN, IN WEIGHT PERCENTPRODUCE A BARRIER LAYER OF METALLIC CARBIDE AND BORONIZED TO PRODUCE A BARRIER LAYER OF METALLIC BORIDES. THIS ABSTRACT IS NEITHER INTENDED TO DEFINE THE INVENTION OF THE APPLICATION, WICH, OF COURSE, IS MEASURED BY THE CLAIMS, NOR IS IT INTENDED TO BE LIMITING AS TO THE SCOPE OF THE INVENTION IN ANY WAY.
Inventors
- 👤 M Chance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:50
CPC Classifications
C; C23; C23C; C23C28/00; C23C12/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549
Claims Analysis
Total Claims: 0
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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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |