Patent US3549608A successfully refreshed from Google Patents.
US3549608A
Expired / Lapsed
US
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Stereosymmetric polypropylene
Assignee: Eastman Kodak Co
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Filing: 1966-12-05
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Granted: 1970-12-22
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Expires: 1986-12-05
Abstract
No abstract record available.
Inventors
- 👤 Harry W Coover Jr
- 👤 Frederick B Joyner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; C; C08; C08F; C08F110/00; C08F110/04; C08F110/06; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/739; G11B5/73923; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S428/92
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |