Patent US1297754A successfully refreshed from Google Patents.
US3286784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical material
Assignee: Armstrong World Industries Inc
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Filing: 1964-02-25
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Granted: 1966-11-22
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Expires: 1984-02-25
Abstract
No abstract record available.
Inventors
- 👤 Mariner Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848; E04B2001/8495; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24942; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
ACOUSTIC SHEET MATERIAL COMPRISING AT LEAST ONE PRIMARY LAYER OF MATERIAL HAVING A PLURALITY OF SPEED, RELATIVELY SMALL PERFORATIONS GENERALLY OF A PREDETERMINED SIZE THERETHROGUH AND HAVING A PLURALITY OF SPACED APERTURES GENERALLY OF SIZE GREATER THAN SAID PREDETERMINED SIZE OF SAID SMALLPERFORATIONS AND AT LEAST ON SECONDARY LAYER OF MATERIAL ON AT LEAST ONE SIDE OF AND ADJACENT SAID PRIMARY LAYER, SAID SECONDARY LAYER HAVING A PLURALITY OF APERTURES OF SUBSTANTIALLY THE SAME SIZE AS AND IN REGISTER WITH SAID PRIMARY LAYER APERTURES.
Claim 2
Dependent Claim
84 words
ACOUSTIC SHEET MATERIAL COMPRISING AT LEAST ONE PRIMARY LAYER OF MATERIAL HAVING A PLURALITY OF SPEED, RELATIVELY SMALL PERFORATIONS GENERALLY OF A PREDETERMINED SIZE THERETHROGUH AND HAVING A PLURALITY OF SPACED APERTURES GENERALLY OF SIZE GREATER THAN SAID PREDETERMINED SIZE OF SAID SMALLPERFORATIONS AND AT LEAST ON SECONDARY LAYER OF MATERIAL ON AT LEAST ONE SIDE OF AND ADJACENT SAID PRIMARY LAYER, SAID SECONDARY LAYER HAVING A PLURALITY OF APERTURES OF SUBSTANTIALLY THE SAME SIZE AS AND IN REGISTER WITH SAID PRIMARY LAYER APERTURES.
References Cited (Backward Citations)
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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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |