US2648104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structure
Assignee: Armstrong World Industries Inc
•
Filing: 1949-06-01
•
Granted: 1953-08-11
•
Expires: 1969-06-01
Abstract
No abstract record available.
Inventors
- 👤 Wylmer L Scott
- 👤 Arthur D Park
- 👤 James T Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:48
CPC Classifications
E; E04; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0864; E04B; E04B2/00; E04B2/56; E04B2/70; E04B2/706; E04B2/709
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |