US3217028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric secondary amines and nitriles
Assignee: General Mills Inc
•
Filing: 1961-09-07
•
Granted: 1965-11-09
•
Expires: 1981-09-07
Abstract
No abstract record available.
Inventors
- 👤 Leonard R Vertnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:35
CPC Classifications
C; C07; C07C; C07C255/00; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
THE POLYMER OF THE STRUCTURE:
Claim 2
Dependent Claim
5 words
THE POLYMER OF THE STRUCTURE:
References Cited (Backward Citations)
US2177619A
Cited
US2435553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |