Patent US3079640A successfully refreshed from Google Patents.
US3079640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating polyvinyl alcohol fibers in a molten metal bath
Assignee: Airco Inc
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Filing: 1958-05-29
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Granted: 1963-03-05
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 Kawai Kigen
- 👤 Tauabe Kenichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:01
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/53; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
THE METHOD OF TREATING POLYVINYL ALCOHOL FIBERS WHICH COMPRISES COATING THE FIBERS WITH A PROTECTIVE COATING AGENT WHICH IS EFFECTIVE TO PREVENT ADHESION OF METAL AND METAL OXIDE PRODUCTS TO THE FIBERS AND TO PREVENT STAINING AND OTHER DAMAGE TO THE FIBERS AS A RESULT OF HEAT TREATMENT OF SAID FIBERS IN MOLTEN METAL MAINTANED AT A TEMPERATURE EFFECTIVE FOR SAID HEAT TREATMENT, SAID COATING AGENT BEING NON-VOLATILE AT THE TEMPERATURE AT WHICH THE MOLTEN METAL IS MAINTANED AND BEING REMOVABLE FROM SAID POLYBINYL ALCOHOL FIBERS AFTER PASSAGE THROUGH SAID BATH, AND SAID COATING AGENT CONSISTING ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE GLYCOL, POLYPROPYLENE GLYCOL, AND MONO ALKYL ETHERS AND FATTY ACID ESTERS THEREOF, HEAT TREATING THE COATED FIBERS IN A HEATED BATH OF MOLTEN METAL, REMOVING SAID COATING AGENT FROM SAID FIBERS AFTER SAID HEAT TREATING AND SUBSEQUENTLY RECOVERING THE TREATED FIBERS SUBSTANTIALLY UNDAMAGED AND FREE OF STAINS AND ADHERING METAL AND METAL OXIDATION PRODUCTS.
Claim 2
Independent Claim
161 words
THE METHOD OF TREATING POLYVINYL ALCOHOL FIBERS WHICH COMPRISES COATING THE FIBERS WITH A PROTECTIVE COATING AGENT WHICH IS EFFECTIVE TO PREVENT ADHESION OF METAL AND METAL OXIDE PRODUCTS TO THE FIBERS AND TO PREVENT STAINING AND OTHER DAMAGE TO THE FIBERS AS A RESULT OF HEAT TREATMENT OF SAID FIBERS IN MOLTEN METAL MAINTANED AT A TEMPERATURE EFFECTIVE FOR SAID HEAT TREATMENT, SAID COATING AGENT BEING NON-VOLATILE AT THE TEMPERATURE AT WHICH THE MOLTEN METAL IS MAINTANED AND BEING REMOVABLE FROM SAID POLYBINYL ALCOHOL FIBERS AFTER PASSAGE THROUGH SAID BATH, AND SAID COATING AGENT CONSISTING ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE GLYCOL, POLYPROPYLENE GLYCOL, AND MONO ALKYL ETHERS AND FATTY ACID ESTERS THEREOF, HEAT TREATING THE COATED FIBERS IN A HEATED BATH OF MOLTEN METAL, REMOVING SAID COATING AGENT FROM SAID FIBERS AFTER SAID HEAT TREATING AND SUBSEQUENTLY RECOVERING THE TREATED FIBERS SUBSTANTIALLY UNDAMAGED AND FREE OF STAINS AND ADHERING METAL AND METAL OXIDATION PRODUCTS.
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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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |