Patent US2773221A successfully refreshed from Google Patents.
US2773221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing circuit
Assignee: CBS Broadcasting Inc
•
Filing: 1952-08-12
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Granted: 1956-12-04
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Expires: 1972-08-12
Abstract
No abstract record available.
Inventors
- 👤 Lloyd E Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:07
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/25; B23K11/251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1672049A
Cited
US2088416A
Cited
FR847227A
Cited
US2265203A
Cited
DE715154C
Cited
US2473683A
Cited
US2412092A
Cited
US2515968A
Cited
US2480678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |