US3211253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical panel comprising a cellular core having a face thereof coated with fibers bridging the cells
Assignee: Douglas Aircraft Co Inc
•
Filing: 1964-01-15
•
Granted: 1965-10-12
•
Expires: 1984-01-15
Abstract
No abstract record available.
Inventors
- 👤 Gonzalez Rodolfo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:09
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; E04B2001/742; E04B2001/748; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PANEL COMPRISING: A CORE OF MULTIPLE CELL CONSTRUCTION OF SOUND ABOSRBENT MATERIAL, EACH CELL EXTENDING THRUGH THE THICKNESS OF THE CORE; A COATING ON A FACE OF SAID CORE COMPRISING NUMEROUS FIBERS OR THREADS IN A MATRIX OF HARDENABLE BINDING OR GLUING SUBSTANCES, SAID FIBERS HAVING A LENGTH GREATER THAN THE WIDTH OF SAID CELLS, AND POSITIONED ON THE EDGES OF SAID CELLS TO FORM BRIDGES BETWEEN SAID CELL EDGES.
Claim 2
Dependent Claim
71 words
A PANEL COMPRISING: A CORE OF MULTIPLE CELL CONSTRUCTION OF SOUND ABOSRBENT MATERIAL, EACH CELL EXTENDING THRUGH THE THICKNESS OF THE CORE; A COATING ON A FACE OF SAID CORE COMPRISING NUMEROUS FIBERS OR THREADS IN A MATRIX OF HARDENABLE BINDING OR GLUING SUBSTANCES, SAID FIBERS HAVING A LENGTH GREATER THAN THE WIDTH OF SAID CELLS, AND POSITIONED ON THE EDGES OF SAID CELLS TO FORM BRIDGES BETWEEN SAID CELL EDGES.
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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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |