US2729180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral pipe machine
Assignee: Armco Inc
•
Filing: 1949-06-28
•
Granted: 1956-01-03
•
Expires: 1969-06-28
Abstract
No abstract record available.
Inventors
- 👤 Freeze Jonathan Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:21
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US849858A
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US828732A
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US1415408A
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US1793281A
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US1788220A
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US1659754A
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US1753829A
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US1884658A
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US2038305A
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US2158796A
Cited
US2155859A
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US2410603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |