US3265154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical panels with spaced layers
Assignee: PRES GLAS Corp A CORP OF MI
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Filing: 1964-07-09
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Granted: 1966-08-09
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Expires: 1984-07-09
Abstract
No abstract record available.
Inventors
- 👤 March John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:52
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8457; E04B2001/8461; E04B2001/8466; E04B2001/8471; E04B2001/8476; E04B2001/848; E04B2001/8485
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN ACOUSTICAL STRUCTURE IN SHEET FORM FOR ABSORBING SOUND WAVES MOVING THROUGH SAID STRUCTURE; COMPRISING A FIRST LAYER OF SOUND ABSORBING MATERIAL HAVING A FIRST PREDETERMINED DENSITY; A SECOND LAYER OF SOUND ABSORBING MATERIAL HAVING A SECOND PREDETERMINED DENSITY GREATER THAN SAID FIRST DENSITY; MEANS FOR LAMINATING FIRST SURFACES OF SAID FIRST AND SECOND LAYERS; THE SECOND SURFACE OF SAID SECOND LAYER HAVING A PLURALITY OF PROJECTIONS ARRANGED IN A PREDETERMINED PATTERN EXTENDING OUTWARD
Claim 2
Dependent Claim
74 words
AN ACOUSTICAL STRUCTURE IN SHEET FORM FOR ABSORBING SOUND WAVES MOVING THROUGH SAID STRUCTURE; COMPRISING A FIRST LAYER OF SOUND ABSORBING MATERIAL HAVING A FIRST PREDETERMINED DENSITY; A SECOND LAYER OF SOUND ABSORBING MATERIAL HAVING A SECOND PREDETERMINED DENSITY GREATER THAN SAID FIRST DENSITY; MEANS FOR LAMINATING FIRST SURFACES OF SAID FIRST AND SECOND LAYERS; THE SECOND SURFACE OF SAID SECOND LAYER HAVING A PLURALITY OF PROJECTIONS ARRANGED IN A PREDETERMINED PATTERN EXTENDING OUTWARD
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |