US2731857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
marino
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
2026-11-02 03:40
CPC Classifications
B; B62; B62L; B62L5/00; B62L5/10; B62L5/14; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20256; Y10T74/20268; Y10T74/2028; Y10T74/20287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US525479A
Cited
US698132A
Cited
GB190112384A
Cited
US865805A
Cited
US1666793A
Cited
GB417272A
Cited
GB449850A
Cited
CH182568A
Cited
US2228006A
Cited
US2509721A
Cited
US2237581A
Cited
US2494558A
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 |