Patent US1775159A successfully refreshed from Google Patents.
US3093618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides from beta-amino carboxylic acids
Assignee: Hoechst AG
•
Filing: 1959-06-09
•
Granted: 1963-06-11
•
Expires: 1979-06-09
Abstract
No abstract record available.
Inventors
- 👤 Graf Roderich
- 👤 Schlack Paul
- 👤 Lohaus Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:09
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
LINEAR, FIBER-FORMING POLYAMIDES CONSISTING ESSENTIALLY OF POLYMERIZED B-MONO-AMINO-MONOCARBOXYLIC ACIDS CONTAINING AT LEAST 4 AND NOT MORE THAN 14 CARBON ATOMS, SAID POLYAMIDES HAVING TWO HYDROGEN ATOMS IN THE APOSITION TO THE CARBONYL GROUP, BEING UNSUBSTITUTED AT THE NITROGEN ATOM, AND HAVING A RELATIVE VISCOSITY OF 1.5 TO 500, MEASURED AS A 1 PERCENT SOLUTION IS CONCENTRATED SULFURIC ACID AT 20* C.
Claim 2
Dependent Claim
61 words
LINEAR, FIBER-FORMING POLYAMIDES CONSISTING ESSENTIALLY OF POLYMERIZED B-MONO-AMINO-MONOCARBOXYLIC ACIDS CONTAINING AT LEAST 4 AND NOT MORE THAN 14 CARBON ATOMS, SAID POLYAMIDES HAVING TWO HYDROGEN ATOMS IN THE APOSITION TO THE CARBONYL GROUP, BEING UNSUBSTITUTED AT THE NITROGEN ATOM, AND HAVING A RELATIVE VISCOSITY OF 1.5 TO 500, MEASURED AS A 1 PERCENT SOLUTION IS CONCENTRATED SULFURIC ACID AT 20* C.
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |