US3395774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverberation chamber with partly flexible movale walls
Assignee: Individual
•
Filing: 1966-09-16
•
Granted: 1968-08-06
•
Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Kurt Seifert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:24
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/08; G10K15/10; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/8218; G01; G01M; G01M9/00; G01M9/02; G01M9/04; G10K11/00; G10K11/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |