Patent JPS638906A successfully refreshed from Google Patents.
US3473941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous panel and method of treating a fibrous panel
Assignee: Armstrong World Industries Inc
•
Filing: 1965-09-22
•
Granted: 1969-10-21
•
Expires: 1985-09-22
Abstract
No abstract record available.
Inventors
- 👤 John M Hemphill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/22; B44C1/221; B24; B24C; B24C1/00; B24C1/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24479
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |