US3426111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the production of foam plastic sheet
Assignee: Dow Chemical Co
•
Filing: 1964-10-19
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Granted: 1969-02-04
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Expires: 1984-10-19
Abstract
No abstract record available.
Inventors
- 👤 Donald W Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:31
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/03; B29C48/09; B29C48/25; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/88; B29C48/90; B29C48/901; B29C48/902; B29C48/001; B29C48/0017; B29C48/10; B29L; B29L2023/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2757153A
Cited
US2720680A
Cited
US2987767A
Cited
US2893877A
Cited
GB854586A
Cited
US2987765A
Cited
US3311681A
Cited
US3299192A
Cited
US3290198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |