US3480997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the thermal treatment of plastic materials
Assignee: Individual
•
Filing: 1967-08-18
•
Granted: 1969-12-02
•
Expires: 1987-08-18
Abstract
No abstract record available.
Inventors
- 👤 Heinz List
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:06
CPC Classifications
B; B29; B29B; B29B13/00; B01; B01F; B01F25/00; B01F25/40; B01F25/45; B01F25/451; B01F31/00; B01F31/40; B01F31/401; B29B7/00; B29B7/74; B29B7/7461; B29C; B29C45/00; B29C45/17; B29C45/72; B29C48/00; B29C48/25; B29C48/36; B29C48/362; B29C48/475; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1796772A
Cited
US2635949A
Cited
US2712799A
Cited
US2815532A
Cited
US2893846A
Cited
US3035303A
Cited
US3408051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |