Patent US2616840A successfully refreshed from Google Patents.
US2616840A
Expired / Lapsed
US
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Rhenium plating
Assignee: Philips Laboratories Inc
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Filing: 1948-11-12
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Granted: 1952-11-04
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Expires: 1968-11-12
Abstract
No abstract record available.
Inventors
- 👤 Levi Roberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:43
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/10; C25D5/48; C25D5/50; C25D5/60; C25D5/615; C25D5/619
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A METHOD OF FORMING ON A BASE OF REFRACTORY METAL A COVERING OF SUBSTANTIAL THICKNESS OF PURE STABLE RHENIUM IN CRYSTALLINE FORM HAVING AN X-RAY DIFFRACTION PATTERN CONTAINING ALL OF THE CHARACTERISTIC LINES OF CRYSTALLINE RHENIUM WHICH COMPRISES THE STEPS OF ELECTRO-DEPOSITING ON THE BASE A THIN LAYER OF AMORPHOUS RHENIUM, TRANSFORMING THE AMORPHOUS RHENIUM LAYER INTO A LAYER OF CRYSTALLINE RHENIUM BY HEATING THE SAME IN A REDUCING ATMOSPHERE AT A TEMPERATURE AT WHICH THE RHENIUM CRYSTALLIZES WITHOUT MELTING, AND SUCCESSIVELY REPEATING THE STEPS UNTIL A COATING OF CRYSTALLINE RHENIUM OF SUBSTANTIAL THICKNESS IS OBTAINED.
References Cited (Backward Citations)
US1565724A
Cited
US1838273A
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US2138573A
Cited
US2149656A
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US2195499A
Cited
US2512141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |