Patent US3420926A successfully refreshed from Google Patents.
US3420926A
Expired / Lapsed
US
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Method for selectively controlling the extrusion of plastic material
Assignee: Monsanto Co
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Filing: 1965-06-04
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Granted: 1969-01-07
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Expires: 1985-06-04
Abstract
No abstract record available.
Inventors
- 👤 Robert B Mason
- 👤 Raymond E Winchester Jr
- 👤 Robert G Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:28
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/32; B29C48/325; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2632202A
Cited
US2871516A
Cited
US3078507A
Cited
US3019480A
Cited
US3019481A
Cited
US3114932A
Cited
US3229007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |