US2502016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffraction type sound absorber
Assignee: RCA Corp
•
Filing: 1943-11-30
•
Granted: 1950-03-28
•
Expires: 1963-11-30
Abstract
No abstract record available.
Inventors
- 👤 Harry F Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:22
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/8209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1851208A
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AU852927A
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US1816769A
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US1726500A
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US1832741A
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US1926679A
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GB406384A
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US1903201A
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GB409502A
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US2101568A
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US2221001A
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US2160638A
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US2308869A
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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) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |