US3419648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding polystyrene
Assignee: Dow Chemical Co
•
Filing: 1965-08-18
•
Granted: 1968-12-31
•
Expires: 1985-08-18
Abstract
No abstract record available.
Inventors
- 👤 Irby H Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:20
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3415; B29C44/3426; B29C44/3434; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C33/00; B29C33/10; B29K; B29K2025/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3097397A
Cited
US3161912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |