Patent US2850574A successfully refreshed from Google Patents.
Patent US1756210A successfully refreshed from Google Patents.
US1756210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair
Assignee: Unisys Corp
•
Filing: 1928-01-23
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Granted: 1930-04-29
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Expires: 1948-01-23
Abstract
No abstract record available.
Inventors
- 👤 Racz Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:52
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/402; A47C3/00; A47C3/20; A47C3/34
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) | 1933-04-28 | 1933-10-28 | 1934-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-28 | 1937-10-28 | 1938-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-28 | 1941-10-28 | 1942-04-29 | $7700.00 | Window Closed / Lapsed |