US2836033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-controlled acoustic wave system
Assignee: AT&T Inc
•
Filing: 1953-07-15
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Granted: 1958-05-27
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Expires: 1973-07-15
Abstract
No abstract record available.
Inventors
- 👤 Warren A Marrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:12
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/04; F; F03; F03G; F03G7/00; F03G7/002; F21; F21V; F21V9/00; F25; F25B; F25B9/00; F25B9/14; F25B9/145; H; H02; H02N; H02N11/00; H02N11/002; F02; F02G; F02G2243/00; F02G2243/30; F02G2243/50; F02G2243/52; F25B2309/00; F25B2309/14; F25B2309/1403; F25B2309/1407; Y; Y10; Y10S; Y10S116/00; Y10S116/22
Claims Analysis
Total Claims: 0
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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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |