US2747222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nylon rod
Assignee: Polymer Corp
•
Filing: 1951-06-11
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Granted: 1956-05-29
•
Expires: 1971-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert B Koch
- 👤 Jr Ralph E James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:34
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/92; B29C48/03; B29C48/06; B29C48/36; B29C48/395; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/86; B29C48/87; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/92085; B29C2948/92095; B29C2948/92104; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/926; B29C2948/92819; B29C2948/92828; B29C2948/92857; B29C2948/92904; B29C2948/92952; B29C48/94; Y; Y10; Y10S; Y10S264/00; Y10S264/61
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
THE METHOD FOR FORMING ELONGATED SHAPES FROM SYNTHETIC LINEAR POLYAMIDES COMPRISING DELIVERING A STREAM OF MOLTEN POLYAMIDE INTO THE ENTRANCE END OF A FORMING TUBE, ADVANCING THE POLYAMIDE THROUGH THE TUBE BY EXERTING A FORCE THEREON, PROGRESSIVELY SOLIDIFYING THE POLYAMIDE IN THE TUBE BY HEAT TRANSFER THROUGH THE TUBE WALL DURING SUCH ADVANCEMENT, IN WHICH METHOD THE PRESSURE IN THE MOLTEN POLYAMIDE IN THE ENTRANCE END OF THE TUBE AND THE RESISTANCE TO ADVANCEMENT OF THE POLYAMIDE THROUGH THE TUBE TEND TO VARY TOGETHER SPASMODICALLY AND IRREGULARLY, AND CONTROLLING THE PRESSURE IN THE ENTRANCE END OF THE TUBE TO MAINTAIN SAID PRESSURE WITHIN PREDETERMINED UPPER AND LOWER LIMITS BY VARYING THE MAGNITUDE OF SAID FORCE IN ACCORDANCE WITH VARIATIONS IN PRESSURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |