US2684067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Office National d'Études et de Recherches Aérospatiales
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Filing: 1951-05-19
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Granted: 1954-07-20
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Expires: 1971-05-19
Abstract
No abstract record available.
Inventors
- 👤 Pierre A Lienard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:47
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/16; A42B3/166
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A NOISE SHIELD FOR THE HUMAN EAR COMPRISING AN ALUMINUM CUP, A FIRST CUP-SHAPED MEMBER OF POLYVINYL CHLORIDE FOAM ADAPTED TO FIT WITHIN THE ALUMINUM CUP AND HAVING A FLARING BRIM EXTENDING BEYOND THE CUP, A CONTINUOUS THIN LEAD-BEARING METALLIC MEMBRANE FITTING WITHIN THE FIRST POLYVINYL CHLORIDE MEMBER AND GLUED THERETO, A SECOND CUP-SHAPED MEMBER OF POLY-
Claim 2
Dependent Claim
57 words
A NOISE SHIELD FOR THE HUMAN EAR COMPRISING AN ALUMINUM CUP, A FIRST CUP-SHAPED MEMBER OF POLYVINYL CHLORIDE FOAM ADAPTED TO FIT WITHIN THE ALUMINUM CUP AND HAVING A FLARING BRIM EXTENDING BEYOND THE CUP, A CONTINUOUS THIN LEAD-BEARING METALLIC MEMBRANE FITTING WITHIN THE FIRST POLYVINYL CHLORIDE MEMBER AND GLUED THERETO, A SECOND CUP-SHAPED MEMBER OF POLY-
References Cited (Backward Citations)
US1873864A
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US2037884A
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US2313379A
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US2478783A
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US2566975A
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US2536261A
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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) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |