Patent JPS5767404A successfully refreshed from Google Patents.
Patent US3388051A successfully refreshed from Google Patents.
US3388051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene graft copolymers produced with high energy ionizing radiation
Assignee: WR Grace and Co
•
Filing: 1960-03-02
•
Granted: 1968-06-11
•
Expires: 1980-03-02
Abstract
No abstract record available.
Inventors
- 👤 William C Rainer
- 👤 Edward M Redding
- 👤 Joseph J Hitov
- 👤 Arthur W Sloan
- 👤 William D Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:39
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C08F; C08F255/00; C08F255/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A GRAFT POLYMER OF IRRADIATED POLYETHYLENE WITH A POLYMER OF STYRENE, SAID STYRENE POLYMER BEING FORMED IN THE PRESENCE OF SAID POLYETHYLENE, SAID IRRADIATION BEING TO AN EXTENT OF AT LEAST 2X10**6 REP.
Claim 2
Dependent Claim
33 words
A GRAFT POLYMER OF IRRADIATED POLYETHYLENE WITH A POLYMER OF STYRENE, SAID STYRENE POLYMER BEING FORMED IN THE PRESENCE OF SAID POLYETHYLENE, SAID IRRADIATION BEING TO AN EXTENT OF AT LEAST 2X10**6 REP.
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) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |