US3065189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of expanded polyamides which contain oxamic acid or oxamic acid esters
Assignee: BASF SE
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Filing: 1958-09-12
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Granted: 1962-11-20
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Expires: 1978-09-12
Abstract
No abstract record available.
Inventors
- 👤 Becke Friedrich
- 👤 Wick Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:54
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/24; C08J2377/00; C08J2377/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR THE PRODUCTION OF EXPANDED POLYAMIDES WHICH COMPRISES: MIXING A COMMINUTED POLYAMIDE SELECTED FROM THE GROUP CONSISTING OF POLYCONDENSATES OF CAPROLACTAM, HEXAMETHYLENE DIAMINE ADIPATE, HEXAMETHYLENE DIAMINE SEBACATE, OMEGA-AMINO-OENANTHIC ACID, OCTAMETHYLENE DIAMINE SUBERATE, OMEGA-AMINOCAPROIC ACID, CAPRYLIC LACTAM AND MIXTURES THEREOF WITH 0.5 TO 10% PER WEIGHT WITH REFERENCE TO THE WEIGHT OF THE POLYAMIDE OF A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
61 words
A PROCESS FOR THE PRODUCTION OF EXPANDED POLYAMIDES WHICH COMPRISES: MIXING A COMMINUTED POLYAMIDE SELECTED FROM THE GROUP CONSISTING OF POLYCONDENSATES OF CAPROLACTAM, HEXAMETHYLENE DIAMINE ADIPATE, HEXAMETHYLENE DIAMINE SEBACATE, OMEGA-AMINO-OENANTHIC ACID, OCTAMETHYLENE DIAMINE SUBERATE, OMEGA-AMINOCAPROIC ACID, CAPRYLIC LACTAM AND MIXTURES THEREOF WITH 0.5 TO 10% PER WEIGHT WITH REFERENCE TO THE WEIGHT OF THE POLYAMIDE OF A COMPOUND OF THE 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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |