US3221055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrate and perchlorate salts of polyethylenimine
Assignee: Zeneca Inc
•
Filing: 1961-12-15
•
Granted: 1965-11-30
•
Expires: 1981-12-15
Abstract
No abstract record available.
Inventors
- 👤 Robins Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:55
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A DRY SOLID SALT OF A HIGH POLYMER OF ETHYLENIMINE HAVING A MOLECULAR WEIGHT OF ABOUT 30,000 TO 45,000 AND AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID AND PERCHLORIC ACID.
Claim 2
Dependent Claim
33 words
A DRY SOLID SALT OF A HIGH POLYMER OF ETHYLENIMINE HAVING A MOLECULAR WEIGHT OF ABOUT 30,000 TO 45,000 AND AN ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID AND PERCHLORIC ACID.
References Cited (Backward Citations)
US2182306A
Cited
US3013382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |