US2667925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing perforations in acoustical tiles
Assignee: Certainteed LLC
•
Filing: 1948-12-23
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Granted: 1954-02-02
•
Expires: 1968-12-23
Abstract
No abstract record available.
Inventors
- 👤 Louis J Dalphone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04B2001/8245; E04B2001/8457; E04B2001/8476; E04B2001/848; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49995
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |