Patent US3074909A successfully refreshed from Google Patents.
US3074909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polypropylene
Assignee: Hercules Powder Co
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Filing: 1960-10-05
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Granted: 1963-01-22
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Expires: 1980-10-05
Abstract
No abstract record available.
Inventors
- 👤 Albert S Matlack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C08K5/33; C08K5/0091; C08K5/49; C08K5/5398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A STEREOREGULAR POLYMER OF AN A-OLEFIN HAVING AT LEAST 3 CARBON ATOMS CONTAINING AS A LIGHT STABILIZER THEREFOR ABOUT 0.01% TO ABOUT 5% BY WEIGHT OF THE POLYMER OF A NICKEL SALT OF AN O-HYDROXYPHENYLBENZOTRIAZOLE HAVING THE FORMULA:
Claim 2
Dependent Claim
38 words
A STEREOREGULAR POLYMER OF AN A-OLEFIN HAVING AT LEAST 3 CARBON ATOMS CONTAINING AS A LIGHT STABILIZER THEREFOR ABOUT 0.01% TO ABOUT 5% BY WEIGHT OF THE POLYMER OF A NICKEL SALT OF AN O-HYDROXYPHENYLBENZOTRIAZOLE HAVING THE FORMULA:
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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |