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US2780443A
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Assignee: Armstrong World Industries Inc
•
Filing: 1953-12-15
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Granted: 1957-02-05
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Expires: 1973-12-15
Abstract
No abstract record available.
Inventors
- 👤 James P Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:41
CPC Classifications
F; F28; F28F; F28F5/00; F28F5/02; B; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C33/044; D; D21; D21F; D21F5/00; D21F5/02; D21F5/022; D21G; D21G1/00; D21G1/02; D21G1/0253; D21G1/0286; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86549
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1016382A
Cited
US1739787A
Cited
US1928173A
Cited
US2435959A
Cited
CH253331A
Cited
US2498662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |