US3144398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene product and process
Assignee: WR Grace and Co
•
Filing: 1958-06-16
•
Granted: 1964-08-11
•
Expires: 1978-06-16
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
2026-10-24 13:15
CPC Classifications
B; B29; B29C; B29C61/00; B29C61/06; B29C71/00; B29C71/04; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A PROCESS COMPRISING STRETCHING POLYETHYLENE AT A TEMPERATURE FROM ROOM TEMPERATURE OF TO 65*C. AND THEN IRRADIATING THE POLYETHLENE AT A DOSAGE BETWEEN ABOUT 20X10**6 AND 200X10**6 REP.
Claim 2
Dependent Claim
28 words
A PROCESS COMPRISING STRETCHING POLYETHYLENE AT A TEMPERATURE FROM ROOM TEMPERATURE OF TO 65*C. AND THEN IRRADIATING THE POLYETHLENE AT A DOSAGE BETWEEN ABOUT 20X10**6 AND 200X10**6 REP.
References Cited (Backward Citations)
GB739709A
Cited
US2855517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |