US2826112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic picture and stereophonic sound systems
Assignee: Warner Bros Entertainment Inc
•
Filing: 1953-05-29
•
Granted: 1958-03-11
•
Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 William A Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:12
CPC Classifications
H; H04; H04S; H04S3/00
Claims Analysis
Total Claims: 0
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GB342284A
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US2628288A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |