Patent US2433847A successfully refreshed from Google Patents.
US2433847A
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US
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Sealed insulation block
Assignee: Armstrong World Industries Inc
•
Filing: 1941-08-09
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Granted: 1948-01-06
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Expires: 1961-08-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Jennings
- 👤 Jr Henry C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:16
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/237; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/28; Y10T428/2839; Y10T428/31504; Y10T428/31551; Y10T428/31641; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2098; Y10T442/2107; Y10T442/2221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1774204A
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US2208236A
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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) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |