Patent US3542961A successfully refreshed from Google Patents.
Patent US2734702A successfully refreshed from Google Patents.
US2734702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
John k
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:51
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/04; B64F1/10; Y; Y02; Y02T; Y02T50/00; Y02T50/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172567A
Cited
US667482A
Cited
US1614841A
Cited
US1798940A
Cited
US1879432A
Cited
US2413724A
Cited
US2149161A
Cited
US2199333A
Cited
US2514406A
Cited
US2370347A
Cited
US2534453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |