Patent US3679552A successfully refreshed from Google Patents.
US3679552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular structures
Assignee: Dunlop Holdings Ltd
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Filing: 1970-06-29
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Granted: 1972-07-25
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Expires: 1990-06-29
Abstract
Abstract A METHOD OF PRODUCING A CELLULAR STRUCTURE WHICH COMPRISES ELECTROPLATING A METAL ON A CONDUCTIVE POROUS SUBSTRATE TO PRODUCE A LAYER OF METAL ON SAID SUBSTRATE AND SUBSEQUENTLY ALLOYING THE METAL BY CONTACTING IT WITH AT LEAST ONE ALLOYING COMPONENT OR A PRECURSOR THEREOF AT AN ELEVATED TEMPERATURE IN ORDER TO INTRODUCE SAID ALLOYING COMPONENT AND THUS PRODUCE A POROUS ALLOY STRUCTURE. THE PRODUCT ALLOY STRUCTURES ARE USEFUL IN APPLICATIONS WHERE METAL CELLULAR STRUCTURES ARE REQUIRED TO HAVE PARTICULAR PROPERTIES, FOR EXAMPLE HIGH PHYSICAL STRENGTH OR GOOD HEAT RESISTANCE.
Inventors
- 👤 Roy Jervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:49
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/08
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |