Patent US1617969A successfully refreshed from Google Patents.
Patent US3391051A successfully refreshed from Google Patents.
US3391051A
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US
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Thermoplastic foam sheet material and apparatus for the manufacture thereof
Assignee: De Bell and Richardson Inc
•
Filing: 1965-04-19
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Granted: 1968-07-02
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Expires: 1985-04-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Ehrenfreund
- 👤 Bell Frederick D De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/34; B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3311681A
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US3151192A
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US3194864A
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US3275731A
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US3221954A
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US3299192A
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US3310617A
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US3290198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |