Patent US2804976A successfully refreshed from Google Patents.
US2804976A
Expired / Lapsed
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Method and apparatus for treating material
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1954-02-03
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Granted: 1957-09-03
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Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 James B Russell
- 👤 Maurice C Fetzer
- 👤 Lloyd H Belz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:44
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US263228A
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GB191102925A
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US1474865A
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US1437737A
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US1618779A
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US1530614A
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US1658650A
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US1665065A
Cited
US1959850A
Cited
US2289925A
Cited
US2271094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |