US2811490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated cobalt catalytic screen
Assignee: North American Aviation Corp
•
Filing: 1954-04-06
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Granted: 1957-10-29
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Expires: 1974-04-06
Abstract
No abstract record available.
Inventors
- 👤 Bert J Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:06
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/02; C01B13/0203; C01B13/0211; C01B13/0214
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A PROCESS FOR FABRICATING A CATALYST SCREEN COMPRISING CLEANING A STRUCTURAL METAL BASE SCREEN, PLATING SAID SCREEN WITH A COBALT-INERT METALLIC SEALING LAYER, ELECTROPLATING SAID SCREEN WITH A POROUS DEPOSIT OF COBALT, DRYING SAID SCREEN, DIPPING SAID SCREEN INTO AN AQUEOUS SOLUTION OF SILVER NITRATE, NITRIC ACID AND COBALT NITRATE, DRYING SAID SCREEN, ELECTROPLATING SAID SCREEN WITH A FURTHER POROUS DEPOSIT OF COBALT, DRYING SAID SCREEN, DIPPING SAID SCREEN INTO AN AQUEOUS SOLUTION OF SILVER NITRATE, NITRIC ACID AND A SOURCE OF COBALT IONS, AND DRYING SAID SCREEN.
References Cited (Backward Citations)
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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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |