Patent US3211956A successfully refreshed from Google Patents.
Patent US3188239A successfully refreshed from Google Patents.
US3188239A
Expired / Lapsed
US
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Spinneret cleaning process
Assignee: Akzona Inc
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Filing: 1963-02-04
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Granted: 1965-06-08
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Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Kloppers Heimen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:24
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02; C; C23; C23G; C23G1/00; C23G1/28; D01D4/04; D01D5/00; D01D5/08; B; B29; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD FOR CLEANINGD APPARATUS USED IN THE MELT EXTRUSION OR POLYMERIC MATERIAL, SAID APPARATUS HAVING BEEN COATED WITH A POLYORGANOSILOXANE DURING THE EXTRUSION PROCESS, CONSISTING ESSENTIALLY OF COATING SAID APPARATUS WITH A WHITE OIL AND THEREAFTER IMMERSING THE APPARATUS IN A MOLTEN SALT BATH CONSISTING OF A MIXTURE OF ALKALI METAL NITRITE AND ALKALI METAL NITRATE FOR A SUFFICIENT PERIOD OF TIME TO DISLODGE AND DECOMPOSE ALL FOREIGN MATTER ON THE SPINNERET SURFACES.
Claim 2
Independent Claim
74 words
A METHOD FOR CLEANINGD APPARATUS USED IN THE MELT EXTRUSION OR POLYMERIC MATERIAL, SAID APPARATUS HAVING BEEN COATED WITH A POLYORGANOSILOXANE DURING THE EXTRUSION PROCESS, CONSISTING ESSENTIALLY OF COATING SAID APPARATUS WITH A WHITE OIL AND THEREAFTER IMMERSING THE APPARATUS IN A MOLTEN SALT BATH CONSISTING OF A MIXTURE OF ALKALI METAL NITRITE AND ALKALI METAL NITRATE FOR A SUFFICIENT PERIOD OF TIME TO DISLODGE AND DECOMPOSE ALL FOREIGN MATTER ON THE SPINNERET SURFACES.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |