US2490765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making corkboard insulation and the like
Assignee: Armstrong World Industries Inc
•
Filing: 1946-11-12
•
Granted: 1949-12-13
•
Expires: 1966-11-12
Abstract
No abstract record available.
Inventors
- 👤 Boyd R Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:13
CPC Classifications
B; B29; B29B; B29B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US681121A
Cited
US846211A
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US997056A
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US999824A
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US1960486A
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US2035956A
Cited
US2258173A
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US2339458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |