US2715620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear superpolyamides of 5-t-butylisophthalic acid
Assignee: California Research LLC
•
Filing: 1953-10-29
•
Granted: 1955-08-16
•
Expires: 1973-10-29
Abstract
No abstract record available.
Inventors
- 👤 Earl F Carlston
- 👤 Funston G Lum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A LINEAR SUPERPOLYAMIDE OF 5-T-BUTYL-ISOPHTHALIC ACID AND AN ALIPHATIC DIAMINE OF 5 TO 10 CARBON ATOMS.
Claim 2
Dependent Claim
16 words
A LINEAR SUPERPOLYAMIDE OF 5-T-BUTYL-ISOPHTHALIC ACID AND AN ALIPHATIC DIAMINE OF 5 TO 10 CARBON ATOMS.
References Cited (Backward Citations)
US2578654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |