US2564092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly-ethylene poly-amino acid compounds
Assignee: Individual
•
Filing: 1948-05-12
•
Granted: 1951-08-14
•
Expires: 1968-05-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:52
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/14; C07C227/18; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/10; C08G69/48; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A POLY-ETHYLENE POLY-AMINO ACID CONFORMING TO THE CHAIN-LIKE STRUCTURE
Claim 2
Dependent Claim
9 words
A POLY-ETHYLENE POLY-AMINO ACID CONFORMING TO THE CHAIN-LIKE STRUCTURE
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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |