US3280069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene containing ethyl 3, 5-ditert-butyl-4-hydroxy-alpha-cyanocinnamate
Assignee: Ethyl Corp
•
Filing: 1965-03-31
•
Granted: 1966-10-18
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Expires: 1985-03-31
Abstract
No abstract record available.
Inventors
- 👤 Gordon G Knapp
- 👤 Calvin J Worrel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:27
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 0
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |