US3117948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyamide yarns having improved resistance to the light
Assignee: SNIA Viscosa SpA
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Filing: 1960-11-14
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Granted: 1964-01-14
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Notarbartolo Luigi
- 👤 Ciceri Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:34
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K5/092; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR THE PREPARATION OF LIGHT-STABLE, COLORFREE POLYAMIDES, COMPRISING THE STEP OF CARRYING OUT THE POLYMERIZATION OF THE POLYAMIDE FORMING MONOMERS IN THE INITIAL PRESENCE OF BETWEEN 0.006% AND 0.08% BY WEIGHT, BASED ON THE MONOMERS, OF MONOBASIC MANGANESE SALTS CHOSEN FROM THE GROUP CONSISTING OF THE MONOBASIC MANGANESE SALT OF ADIPIC ACID AND THE MONOBASIC MANGANESE SALT OF SEBACIC ACID.
Claim 2
Dependent Claim
62 words
A PROCESS FOR THE PREPARATION OF LIGHT-STABLE, COLORFREE POLYAMIDES, COMPRISING THE STEP OF CARRYING OUT THE POLYMERIZATION OF THE POLYAMIDE FORMING MONOMERS IN THE INITIAL PRESENCE OF BETWEEN 0.006% AND 0.08% BY WEIGHT, BASED ON THE MONOMERS, OF MONOBASIC MANGANESE SALTS CHOSEN FROM THE GROUP CONSISTING OF THE MONOBASIC MANGANESE SALT OF ADIPIC ACID AND THE MONOBASIC MANGANESE SALT OF SEBACIC ACID.
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) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |