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US2569856A
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US
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Apparatus for making tubing
Assignee: ATF Inc
•
Filing: 1946-11-23
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Granted: 1951-10-02
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Expires: 1966-11-23
Abstract
No abstract record available.
Inventors
- 👤 Hill John Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:51
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0822
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US647234A
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US914384A
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US1090369A
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US1284297A
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US1646479A
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US2355985A
Cited
US2440390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |