US3450807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic sheet formation
Assignee: Dow Chemical Co
•
Filing: 1967-06-26
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Granted: 1969-06-17
•
Expires: 1987-06-26
Abstract
No abstract record available.
Inventors
- 👤 Grant W Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/04; B29C67/00; B29C2793/00; B29C2793/009; B29C51/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3060507A
Cited
US3291874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |