Patent US2855517A successfully refreshed from Google Patents.
US2855517A
Expired / Lapsed
US
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Irradiation treatment of polyethylene
Assignee: WR Grace and Co
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Filing: 1955-07-20
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Granted: 1958-10-07
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Expires: 1975-07-20
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
2026-10-23 15:29
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2995/00; B29K2995/0018; B29K2995/0026; Y; Y10; Y10S; Y10S285/00; Y10S285/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS COMPRISING HEATING POLYETHYLENE UNTIL IT BECOMES CLEAR AND TRANSPARENT, THEN QUENCHING THE POLYETHYLENE TO PRESERVE THE CLARITY AND THEREAFTER IRRIDIATING THE POLETHYLENE WITH ELECTRONS AT A DOSAGE OF AT LEAST ABOUT 2X10**6 REP WHILE IN THE CLEAR CONDITION AND BELOW THE TRANSITION POINT WHEREBY THE TRANSPARECNY IS AT LEAST PARTIALLY SET AGAINST SUBSEQUENT HEATING TO THE TRANSITION POINT AND SLOW COOLING.
Claim 2
Dependent Claim
63 words
A PROCESS COMPRISING HEATING POLYETHYLENE UNTIL IT BECOMES CLEAR AND TRANSPARENT, THEN QUENCHING THE POLYETHYLENE TO PRESERVE THE CLARITY AND THEREAFTER IRRIDIATING THE POLETHYLENE WITH ELECTRONS AT A DOSAGE OF AT LEAST ABOUT 2X10**6 REP WHILE IN THE CLEAR CONDITION AND BELOW THE TRANSITION POINT WHEREBY THE TRANSPARECNY IS AT LEAST PARTIALLY SET AGAINST SUBSEQUENT HEATING TO THE TRANSITION POINT AND SLOW COOLING.
References Cited (Backward Citations)
US2437914A
Cited
US2702863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |