Patent US4597307A successfully refreshed from Google Patents.
Patent US3751545A successfully refreshed from Google Patents.
US3751545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of plastic spinnerettes by means of stacked mandrels
Assignee: Wyeth Holdings LLC
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Filing: 1970-09-03
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Granted: 1973-08-07
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Expires: 1990-09-03
Abstract
Abstract A METHOD OF MAKING SPINNERETTES COMPRISING CASTING A PLASTIC RESIN INTO A MOLD CAVITY DEFINED BY A PLURALITY OF COMB-LIKE ELEMENTS SUPPORTED ABOVE THE CAVITY, SAID ELEMENTS INSERTED VERTICALLY DOWNWARD INTO SAID CAVITY, AND WITHDRAWING SAID ELEMENTS AFTER THE RESIN HAS HARDENED THEREBY LEAVING A PLURAITY OF HOLES IN THE CASTING WHICH ARE THE ORIFICES OF THE FINISHED SPINNERETTE. THIS METHOD ENABLES THE MANUFACTURE OF SPINNERETTES HAVING A LARGE NUMBER OF ORIFICES OF ANY DESIRED SHAPE.
Inventors
- 👤 J Peeso
- 👤 D Murfitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:19
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02; D01D4/022; B; B29; B29C; B29C33/00; B29C33/0033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |