Patent US3511903A successfully refreshed from Google Patents.
US3511903A
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Method for extruding thermally degradable polymers
Assignee: Dow Chemical Co
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Filing: 1967-05-05
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Granted: 1970-05-12
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Expires: 1987-05-05
Abstract
No abstract record available.
Inventors
- 👤 Henry L Glass
- 👤 Walter J Schrenk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:08
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C48/305; B29C48/307; B29C48/33
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) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |