US2457299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface covered structure and surface covering therefor
Assignee: Armstrong World Industries Inc
•
Filing: 1944-01-11
•
Granted: 1948-12-28
•
Expires: 1964-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jr George K Biemesderfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:39
CPC Classifications
H; H05; H05F; H05F3/00; H05F3/02; H05F3/025; E; E04; E04F; E04F15/00; E04F15/02; E04F15/10; H01; H01B; H01B1/00; H01B1/20; H01B1/24
Claims Analysis
Total Claims: 0
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US2302003A
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US2327029A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |