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Patent US3472491A successfully refreshed from Google Patents.
US3472491A
Expired / Lapsed
US
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Apparatus suitable for treatment of thermoplastic material to improve flowability thereof
Assignee: WEDCO Inc A NJ CORP
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Filing: 1968-01-04
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Granted: 1969-10-14
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Expires: 1988-01-04
Abstract
No abstract record available.
Inventors
- 👤 Friedhelm R Feder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:22
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/72; B29B7/726; B01; B01F; B01F27/00; B01F27/60; B01F27/70; B01F27/708; B01F35/00; B01F35/20; B01F35/21; B01F35/211; B01F35/2115; B01F35/75; B01F35/754; B01F35/7547; B01F35/75471; B01F27/05; B01F27/11; B01F27/112; B01F27/1121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2564295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |