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Patent US2640235A successfully refreshed from Google Patents.
US2640235A
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US
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Metal manufacturing apparatus
Assignee: Individual
•
Filing: 1949-06-02
•
Granted: 1953-06-02
•
Expires: 1969-06-02
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Hazelett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:56
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0605; Y; Y10; Y10S; Y10S425/00; Y10S425/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US359348A
Cited
US594583A
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US1870406A
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US1822256A
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US2285740A
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FR884516A
Cited
CH233228A
Cited
FR900022A
Cited
US2450428A
Cited
US2560639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |