Patent US1888807A successfully refreshed from Google Patents.
US1888807A
Expired / Lapsed
US
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Machine for shaping metal tubes
Assignee: AVIAT PATENT AND RES CORP
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Filing: 1932-03-18
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Granted: 1932-11-22
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Expires: 1952-03-18
Abstract
No abstract record available.
Inventors
- 👤 Rivers Elmer James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:14
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/155; B21C3/00; B21C3/02; B21C3/08
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) | 1935-11-22 | 1936-05-23 | 1936-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-11-22 | 1940-05-23 | 1940-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-11-22 | 1944-05-23 | 1944-11-22 | $7700.00 | Window Closed / Lapsed |