US3443276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making walled structures of plastic foam
Assignee: Dow Chemical Co
•
Filing: 1965-12-15
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Granted: 1969-05-13
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Expires: 1985-12-15
Abstract
No abstract record available.
Inventors
- 👤 Hubert S Smith
- 👤 Donald R Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:13
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20; E; E04; E04B; E04B1/00; E04B1/32; E04B1/3211; E04B1/35; E04B2001/3217; E04B2001/3229; E04B2001/3258; E04B2001/3264; Y; Y10; Y10S; Y10S425/00; Y10S425/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |