US2815795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Honeycomb core material and method of fabricating the same
Assignee: Armstrong World Industries Inc
•
Filing: 1955-02-16
•
Granted: 1957-12-10
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Expires: 1975-02-16
Abstract
No abstract record available.
Inventors
- 👤 Poel Frederick T Vander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:15
CPC Classifications
B; B21; B21D; B21D47/00; B31; B31D; B31D3/00; B31D3/02; B31D3/0207; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; F; F16; F16L; F16L59/00; F16L59/06; F16L59/07; Y; Y10; Y10S; Y10S138/00; Y10S138/09; Y10S165/00; Y10S165/907; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49373; Y10T29/49826; Y10T29/49879; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733176A
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US1942989A
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GB377135A
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US2322204A
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US2537026A
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US2609068A
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US2728479A
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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) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |