Patent US2216718A successfully refreshed from Google Patents.
US2216718A
Expired / Lapsed
US
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Manufacturing metallic tubular articles
Assignee: National Tube Co
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Filing: 1937-08-02
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Granted: 1940-10-08
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Expires: 1957-08-02
Abstract
No abstract record available.
Inventors
- 👤 Bannister Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:15
CPC Classifications
B; B21; B21B; B21B19/00; B21B19/02; B21B19/04; B21B1/00; B21B1/16; B21B1/20; B21B15/00; B21B15/0007; B21B2015/0021; B21B45/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-08 | 1944-04-08 | 1944-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-08 | 1948-04-08 | 1948-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-08 | 1952-04-08 | 1952-10-08 | $7700.00 | Window Closed / Lapsed |