US2554486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing fibrous material
Assignee: Armstrong World Industries Inc
•
Filing: 1947-09-30
•
Granted: 1951-05-29
•
Expires: 1967-09-30
Abstract
No abstract record available.
Inventors
- 👤 Chester R Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:10
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190803010A
Cited
US1328446A
Cited
DE601354C
Cited
US2178871A
Cited
US2233304A
Cited
US2455908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |