US3949039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for pelletizing synthetic resins having a high melting point
Assignee: Japan Steel Works Ltd
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Filing: 1974-11-08
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Granted: 1976-04-06
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Expires: 1994-11-08
Abstract
Abstract Synthetic resins are extruded through nozzles of a die under water, each nozzle having a straight bore having an inner diameter of 3 mm or above at a velocity of at least 1.0 m/sec. and cut into pellets under the water in front of the exits of the nozzles.
Inventors
- 👤 Michiaki Yamamoto
- 👤 Tsutomu Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:55
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; B29B7/00; B29B7/30; B29B7/58; B29B7/582; B29B7/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
A method for pelletizing synthetic resins having high melting points, comprising the steps of: extruding said resins under water through nozzles of a die, each nozzle having a constant diameter of at least 3 mm, said resins being extruded at a velocity of at least 1 m/sec., said water temperature being between 80° and 90°C.; and cutting said extruded resins into pellets under the water in front of the exits of said nozzles.
Claim 2
Independent Claim
73 words
A method for pelletizing synthetic resins having high melting points, comprising the steps of: extruding said resins under water through nozzles of a die, each nozzle having a constant diameter of at least 3 mm, said resins being extruded at a velocity of at least 1 m/sec., said water temperature being between 80° and 90°C.; and cutting said extruded resins into pellets under the water in front of the exits of said nozzles.
Claim 3
Dependent Claim
16 words
The method of claim 1, wherein the synthetic resins have melting points of 200°C and above.
References Cited (Backward Citations)
US2401236A
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US2614290A
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US3174183A
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US3341892A
Cited
US3436449A
Cited
US3544525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |