Patent US2021893A successfully refreshed from Google Patents.
US2021893A
Expired / Lapsed
US
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Improvements in apparatus for making metal floor panels
Assignee: BELMONT IRON WORKS
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Filing: 1933-09-08
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Granted: 1935-11-26
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Expires: 1953-09-08
Abstract
No abstract record available.
Inventors
- 👤 John A Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04; B23K37/0426; B23K37/0452
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) | 1938-11-25 | 1939-05-27 | 1939-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-25 | 1943-05-27 | 1943-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-25 | 1947-05-27 | 1947-11-26 | $7700.00 | Window Closed / Lapsed |