US3202561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making acoustical tile with thermoplastic film covering
Assignee: Johns Manville Corp
•
Filing: 1961-03-30
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Granted: 1965-08-24
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Expires: 1981-03-30
Abstract
No abstract record available.
Inventors
- 👤 Vernon L Swanson
- 👤 William A Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:01
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B29; B29C; B29C51/00; B29C51/16; E04B2001/8245; E04B2001/8457; E04B2001/8476; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1034; Y10T156/1052; Y10T156/1062; Y10T156/1064; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
81 words
A METHOD OF FORMING A CELLULOSIC FIBROUS ACOUSTICL PANEL COMPRISING FORMING A PLURALITY OF PERFORATIONS IN A SURFACE OF THE CELLULOSIC PANEL SO AS TO OPEN THE BODY THEREOF TO BETTER ABSORPTION OF SOUND, MAINTAINING HE PANEL WITH A MOISTURE CONTENT LESS THAN IT WOULD CONTAIN UNDER AVERAGE AMBIENT CONDITIONS, AND APPLYING A SHEET OF THERMOPLASTIC COVERING MATERIAL TO THE PERFORATED SURFACE AND SIDE EDGES OF THE PANEL BEFORE THE PANEL REACHES AN EQUILIBRIUM MOISTURE CONDITION WITH THE ATMOSPHERE ADJACENT THERETO.
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |