US2731856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spatta
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:13
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; B60K17/105; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19019; Y10T74/19023; Y10T74/19037; Y10T74/19051; Y10T74/19065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE13853E
Cited
US653855A
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US1614819A
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US2141940A
Cited
US2171715A
Cited
US2310513A
Cited
FR885427A
Cited
GB614914A
Cited
US2466244A
Cited
FR992734A
Cited
GB613370A
Cited
US2693120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |