US3214565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling tile adapted for electrical heating and sound absorption
Assignee: Armstrong World Industries Inc
•
Filing: 1963-01-30
•
Granted: 1965-10-26
•
Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Nathaniel E Hager
- 👤 John M Hemphill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:57
CPC Classifications
F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2455926A
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US2771164A
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US2719213A
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US2615115A
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US2677749A
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US2785099A
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US2721731A
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GB713684A
Cited
US2952761A
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US2992351A
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US3137364A
Cited
FR1257121A
Cited
US3143637A
Cited
US3147926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |