Patent US3210321A successfully refreshed from Google Patents.
US3210321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene stabilized with nitrates
Assignee: WR Grace and Co
•
Filing: 1961-07-21
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Granted: 1965-10-05
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Expires: 1981-07-21
Abstract
No abstract record available.
Inventors
- 👤 Carroll F Doyle
- 👤 Luther O Young
- 👤 Bieniek Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:20
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/28; C08K5/00; C08K5/0091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A LIGHT, STABLE POLYETHYLENE COMPOSITION COMPRISING POLYETHYLENE AND A LIGHT STABILIZING AMOUNT OF A MEMBER OF THE GROUP CONSISTING OF CUPRIC DIISOPROPYLAMINE NITRATE, CUPRIC TRIISOPROPYLAMINE NITRATE, AND MANGANOUS CEROUS NITRATE.
Claim 2
Dependent Claim
30 words
A LIGHT, STABLE POLYETHYLENE COMPOSITION COMPRISING POLYETHYLENE AND A LIGHT STABILIZING AMOUNT OF A MEMBER OF THE GROUP CONSISTING OF CUPRIC DIISOPROPYLAMINE NITRATE, CUPRIC TRIISOPROPYLAMINE NITRATE, AND MANGANOUS CEROUS NITRATE.
References Cited (Backward Citations)
CA453740A
Cited
CA573127A
Cited
US2491444A
Cited
US2879257A
Cited
GB767897A
Cited
US2935617A
Cited
US2960489A
Cited
US2964495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |