US2734447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
kurek
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
2026-10-31 07:46
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/26; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/8593
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1179406A
Cited
US1296968A
Cited
US1918927A
Cited
US1887938A
Cited
FR737015A
Cited
US1973623A
Cited
US1999148A
Cited
US2032692A
Cited
US2168783A
Cited
US2304628A
Cited
GB530178A
Cited
US2372830A
Cited
US2285346A
Cited
US2313256A
Cited
US2341296A
Cited
US2580835A
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 |