Patent US2803539A successfully refreshed from Google Patents.
US2803539A
Expired / Lapsed
US
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Fe-cr-ni alloys
Assignee: Jessop William & Sons Ltd
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Filing: 1954-08-24
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Granted: 1957-08-20
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Expires: 1974-08-24
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey T Harris
- 👤 Henry C Child
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:03
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
ALLOYS CONSISTING OF THE FOLLOWING CONSTITUENTS IN THE AMOUNTS BY WEIGHT AS STATED IN THE FOLLOWING RANGES:
Claim 2
Dependent Claim
17 words
ALLOYS CONSISTING OF THE FOLLOWING CONSTITUENTS IN THE AMOUNTS BY WEIGHT AS STATED IN THE FOLLOWING RANGES:
References Cited (Backward Citations)
US2519406A
Cited
US2758025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |