US2731808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stark
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
2026-10-24 14:52
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/12; F25D3/14; A; A41; A41D; A41D13/00; A41D13/002; A41D13/005; A41D13/0053; F25D2400/00; F25D2400/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1902016A
Cited
US2093834A
Cited
GB455283A
Cited
US2090590A
Cited
US2540547A
Cited
US2580210A
Cited
US2630573A
Cited
US2627072A
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 |