Patent US2213249A successfully refreshed from Google Patents.
US2213249A
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Insulation board and method of making the same
Assignee: Armstrong World Industries Inc
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Filing: 1934-07-23
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Granted: 1940-09-03
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Expires: 1954-07-23
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:30
CPC Classifications
B; B28; B28B; B28B19/00; B28B19/0092; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011; Y10T156/1089; Y10T156/1092; Y10T156/1093; Y10T156/1095; Y10T428/00; Y10T428/18; Y10T428/183; Y10T428/187; Y10T428/24; Y10T428/24058; Y10T428/24066; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249968; Y10T428/249987
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-09-03 | 1944-03-04 | 1944-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-03 | 1948-03-04 | 1948-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-03 | 1952-03-04 | 1952-09-03 | $7700.00 | Window Closed / Lapsed |