US3137364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of perforated acoustic bodies
Assignee: Wood Conversion Co
•
Filing: 1958-10-06
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Granted: 1964-06-16
•
Expires: 1978-10-06
Abstract
No abstract record available.
Inventors
- 👤 David W Akerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:01
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/001; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B9/04; E04B9/045; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848; E04B2001/8485
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
AN ACOUSTICAL MATERIAL COMPRISING A RIGID INTEGRAL BODY PORTION HAVING SOUND-ABSORBING POROSITY AND HAVING A SOUND-RECEIVING FACE, A COAT ON SAID FACE WHICH IS SUBSTANTIALLY NON-ABSORBENT WITH RESPECT TO SOUND, SAID FACE HAVING A MULTIPLICITY OF SOUND-RECEIVING OPENINGS, SAID OPENINGS BEING THE OUTER ENDS OF TUBULAR CHANNELS IN SAID BODY PORTION AND THROUGH SAID COAT, SAID CHANNELS HAVING WALLS EXTENDING NORMAL TO SAID FACE IN AN APPRECIABLY THICK LAYER OF SAID BODY PORTION, SAID BODY PORTION INWARD LY OF SAID LAYER HAVING CAVITIES WHOLLY WITHIN SAID BODY PORTIONS, SAIDCAVITIES BEING ENLARGEMENTS IN THE DIRECTION PARALLEL TO SAID FACE OF THE INNER ENDS OF SAID TUBULAR CHANNELS, A SUBSTANTIAL PORTION OF THE WALL AREA OF EACH CAVITY BEING POROUS SOUND-ABSORBING SURFACE COMMUNICATING WITH THE POROSITY OF SAID BODY PORTION.
Claim 2
Dependent Claim
128 words
AN ACOUSTICAL MATERIAL COMPRISING A RIGID INTEGRAL BODY PORTION HAVING SOUND-ABSORBING POROSITY AND HAVING A SOUND-RECEIVING FACE, A COAT ON SAID FACE WHICH IS SUBSTANTIALLY NON-ABSORBENT WITH RESPECT TO SOUND, SAID FACE HAVING A MULTIPLICITY OF SOUND-RECEIVING OPENINGS, SAID OPENINGS BEING THE OUTER ENDS OF TUBULAR CHANNELS IN SAID BODY PORTION AND THROUGH SAID COAT, SAID CHANNELS HAVING WALLS EXTENDING NORMAL TO SAID FACE IN AN APPRECIABLY THICK LAYER OF SAID BODY PORTION, SAID BODY PORTION INWARD LY OF SAID LAYER HAVING CAVITIES WHOLLY WITHIN SAID BODY PORTIONS, SAIDCAVITIES BEING ENLARGEMENTS IN THE DIRECTION PARALLEL TO SAID FACE OF THE INNER ENDS OF SAID TUBULAR CHANNELS, A SUBSTANTIAL PORTION OF THE WALL AREA OF EACH CAVITY BEING POROUS SOUND-ABSORBING SURFACE COMMUNICATING WITH THE POROSITY OF SAID BODY PORTION.
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |