US3240847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming plastic blocks
Assignee: General Refractories Co
•
Filing: 1964-10-07
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Granted: 1966-03-15
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Expires: 1984-10-07
Abstract
No abstract record available.
Inventors
- 👤 Paul E Mckee
- 👤 Charles F Fay
- 👤 Florence L Harshberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:32
CPC Classifications
B; B29; B29C; B29C39/00
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |