US3511744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sag-resistant fiberboard panel and method of making the same
Assignee: Armstrong World Industries Inc
•
Filing: 1965-07-27
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Granted: 1970-05-12
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Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 Fred Garrett Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:20
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24471; Y10T428/24802; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/31971; Y10T428/31993
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) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |