US3272773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing stabilized polycarbonamides containing a metal chelate of 8-hydroxyquinoline
Assignee: EIDP Inc
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Filing: 1962-10-01
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Granted: 1966-09-13
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Edison David Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:53
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; C; C08; C08K; C08K5/00; C08K5/0091; D01F1/00; D01F1/02; D01F1/10; D01F6/78; D01F6/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A PROCESS OF SPINNING YARN FROM A MOLTEN SYNTHETIC POLYCARBONAMIDE WHICH HAS BEEN FILTERED THROUGH A SAND PACK, THE IMPROVEMENT WHICH CONSISTS OF INCORPORATING IN SAID MELT IN AN AMOUNT OF AT LEAST 0.005% BASED ON THE WEIGHT OF SAID POLYCARBONAMIDE, AT A POINT UPSTREAM FROM SAID SAND PACK, A METAL CHELATE OF AN 8HYDROXYQUINOLINE WHICH IS STABLE AT THE TEMPERATURE OF SAID MELT, WHEREBY TO PRODUCE A YARN OF IMPROVED DURABILITY TO HEATING IN OPEN AIR WITHOUT CUMULATIVELY PLUGGING SAID SAND PACK BY DEPOSITION OF METAL PARTICLES AS THE MELT PASSES THROUGH IT.
Claim 2
Dependent Claim
95 words
IN A PROCESS OF SPINNING YARN FROM A MOLTEN SYNTHETIC POLYCARBONAMIDE WHICH HAS BEEN FILTERED THROUGH A SAND PACK, THE IMPROVEMENT WHICH CONSISTS OF INCORPORATING IN SAID MELT IN AN AMOUNT OF AT LEAST 0.005% BASED ON THE WEIGHT OF SAID POLYCARBONAMIDE, AT A POINT UPSTREAM FROM SAID SAND PACK, A METAL CHELATE OF AN 8HYDROXYQUINOLINE WHICH IS STABLE AT THE TEMPERATURE OF SAID MELT, WHEREBY TO PRODUCE A YARN OF IMPROVED DURABILITY TO HEATING IN OPEN AIR WITHOUT CUMULATIVELY PLUGGING SAID SAND PACK BY DEPOSITION OF METAL PARTICLES AS THE MELT PASSES THROUGH IT.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |