US3226351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene of improved clarity
Assignee: WR Grace and Co
•
Filing: 1962-12-10
•
Granted: 1965-12-28
•
Expires: 1982-12-10
Abstract
No abstract record available.
Inventors
- 👤 Frank X Werber
- 👤 Razmic S Gregorian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/057; Y; Y10; Y10S; Y10S260/00; Y10S260/35
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
A COMPOSITION OF MATTER USEFUL IN THE PRODUCTION OF PROCESSABLE POLYETHYLENE OF IMPROVED CLARITY CONSISTING ESSENTIALLY OF (A) LINEAR POLYETHYLENE HAVING A DENSITY IN THE RANGE 0.940 TO 0.980 (B) 0.001 TO 1.0% BY WEIGHT OF SAID POLYETHYLENE OF AN ALUMINUM-CONTAINING ADDITIVE OF THE FORMULA
References Cited (Backward Citations)
US2990389A
Cited
US3175996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |