US2555111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resin from dimerized unsaturated fatty acids of natural fatty oils
Assignee: Shell Development Co
•
Filing: 1948-09-04
•
Granted: 1951-05-29
•
Expires: 1968-09-04
Abstract
No abstract record available.
Inventors
- 👤 Theodore F Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:06
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE RESINOUS POLYAMIDE OF (1) DIMERIZED OLEFINICALLY UNSATURATED FATTY ACID OF NATURAL FATTY OIL, WHICH FATTY ACID CONTAINS 16 TO 22 CARBON ATOMS, AND (2) A SATURATED ALIPHATIC DIAMINE HAVING TWO PRIMARY AMINO GROUPS, ONE OF WHICH IS LINKED DIRECTLY TO A TERTIARY CARBON ATOM.
Claim 2
Dependent Claim
45 words
THE RESINOUS POLYAMIDE OF (1) DIMERIZED OLEFINICALLY UNSATURATED FATTY ACID OF NATURAL FATTY OIL, WHICH FATTY ACID CONTAINS 16 TO 22 CARBON ATOMS, AND (2) A SATURATED ALIPHATIC DIAMINE HAVING TWO PRIMARY AMINO GROUPS, ONE OF WHICH IS LINKED DIRECTLY TO A TERTIARY CARBON ATOM.
References Cited (Backward Citations)
US2130523A
Cited
US2379413A
Cited
US2371736A
Cited
US2450940A
Cited
US2442958A
Cited
US2461495A
Cited
US2486648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |