Patent US2433643A successfully refreshed from Google Patents.
US2433643A
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Process of treating phenolic sheet
Assignee: North American Aviation Corp
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Filing: 1943-11-11
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Granted: 1947-12-30
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Expires: 1963-11-11
Abstract
No abstract record available.
Inventors
- 👤 William I Beach
- 👤 Robert L Whann
- 👤 Algot S Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:51
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29B; B29B13/00; B29B13/02; B29B13/023; B29C35/00; B29C35/02; B29C39/00; B29C51/00; B29C51/002; B29C51/004; B29C67/00; B29C67/0011; B29C2035/0211; Y; Y10; Y10S; Y10S264/00; Y10S264/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB371344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |