Patent US2733774A successfully refreshed from Google Patents.
US2733774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pessel
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:08
CPC Classifications
H; H04; H04R; H04R7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2028126A
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US2006830A
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US2123155A
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US2099154A
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US2102150A
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US2369450A
Cited
US2302178A
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US2309027A
Cited
US2493255A
Cited
US2405038A
Cited
US2504124A
Cited
US2464783A
Cited
US2684726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |