US2750346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic screen
Assignee: North American Aviation Corp
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Filing: 1953-02-24
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Granted: 1956-06-12
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Expires: 1973-02-24
Abstract
No abstract record available.
Inventors
- 👤 Bert J Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:30
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/06; C25D7/0607; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/12639; Y10T428/12646
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A CATALYTIC SCREEN COMPRISING A GRID OF STEEL WIRE, SAID GRID BEING ELECTROPLATED WITH A THIN LAYER OF COPPER, SAID COPPER BEING ELECTROPLATED WITH A LAYER OF IRON, AND SAID IRON BEING COVERED WITH A THIN LAYER FORMED BY DIPPING THE IRON-PLATED WIRE IN A MIXED SILVER NITRATE AND NITRIC ACID SOLUTION FOR A SHORT INTERVAL OF TIME.
Claim 2
Dependent Claim
58 words
A CATALYTIC SCREEN COMPRISING A GRID OF STEEL WIRE, SAID GRID BEING ELECTROPLATED WITH A THIN LAYER OF COPPER, SAID COPPER BEING ELECTROPLATED WITH A LAYER OF IRON, AND SAID IRON BEING COVERED WITH A THIN LAYER FORMED BY DIPPING THE IRON-PLATED WIRE IN A MIXED SILVER NITRATE AND NITRIC ACID SOLUTION FOR A SHORT INTERVAL OF TIME.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |