US2552556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-speed transmission apparatus
Assignee: Unisys Corp
•
Filing: 1947-02-04
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Granted: 1951-05-15
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Expires: 1967-02-04
Abstract
No abstract record available.
Inventors
- 👤 Eric J Isbister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:35
CPC Classifications
G; G06; G06M; G06M3/00; G06M3/08; G06M1/00; G06M1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB161848A
Cited
US1349049A
Cited
US1179358A
Cited
US1464208A
Cited
US1337551A
Cited
GB235148A
Cited
US2235826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |