Patent US2779387A successfully refreshed from Google Patents.
US2779387A
Expired / Lapsed
US
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Method of manufacturing hard surface covering with partial removal of the selvage bands
Assignee: Armstrong World Industries Inc
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Filing: 1953-06-22
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Granted: 1957-01-29
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Expires: 1973-06-22
Abstract
No abstract record available.
Inventors
- 👤 Edward G Schairer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:17
CPC Classifications
D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0028; Y; Y10; Y10S; Y10S425/00; Y10S425/235
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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |