US3060135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of expanded polyamides
Assignee: BASF SE
•
Filing: 1958-08-05
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Granted: 1962-10-23
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Expires: 1978-08-05
Abstract
No abstract record available.
Inventors
- 👤 Becke Friedrich
- 👤 Wick Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/142; C08G; C08G69/00; C08G69/02; C08J9/02; C08J2377/00; C08J2377/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR THE PRODUCTION OF EXPANDED POLYAMIDES WHICH COMPRISES CONDENSING A LINEAR POLYAMIDEFORMING COMPOUND SELECTED FROM THE GROUP CONSISTING OF HEXAMETHYLENE DIAMINE ADIPATE, HEXAMETHYLENE DIAMINE SEBACATE, OCTAMETHYLENE DIAMINE SUBERICATE, OMEGA-AMINOCAPROIC ACID, CAPROLACTAM, OENANTHIC LACTAM, CAPRYLIC LACTAM AND MIXTURES THEREOF IN THE PRESENCE OF FROM 0.5 TO 20% BY WEIGHT WITH REFERENCE TO SAID POLYAMIDE-FORMING COMPOUND OF A MIXTURE OF (1) A CARBOXYLIC ACID ESTER OF AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL AND (2) A HYDROXY-ALKYL-DIAMINE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
85 words
A PROCESS FOR THE PRODUCTION OF EXPANDED POLYAMIDES WHICH COMPRISES CONDENSING A LINEAR POLYAMIDEFORMING COMPOUND SELECTED FROM THE GROUP CONSISTING OF HEXAMETHYLENE DIAMINE ADIPATE, HEXAMETHYLENE DIAMINE SEBACATE, OCTAMETHYLENE DIAMINE SUBERICATE, OMEGA-AMINOCAPROIC ACID, CAPROLACTAM, OENANTHIC LACTAM, CAPRYLIC LACTAM AND MIXTURES THEREOF IN THE PRESENCE OF FROM 0.5 TO 20% BY WEIGHT WITH REFERENCE TO SAID POLYAMIDE-FORMING COMPOUND OF A MIXTURE OF (1) A CARBOXYLIC ACID ESTER OF AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF METHANOL AND ETHANOL AND (2) A HYDROXY-ALKYL-DIAMINE OF THE GENERAL FORMULA
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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |