Patent US2938567A successfully refreshed from Google Patents.
US2938567A
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Machine and method for producing prefabricated material of cellular construction
Assignee: WILLOUGHBY NEVIL DAVIS
•
Filing: 1956-05-15
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Granted: 1960-05-31
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Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 Allan Charles Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:19
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/245; B29; B29C; B29C53/00; B29C53/22; B29C53/24; B29C53/28; B29C53/285; B31D; B31D3/00; B31D3/005; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/102; Y10T156/12; Y10T156/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |