Patent US3468858A successfully refreshed from Google Patents.
US3468858A
Expired / Lapsed
US
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Vinyl chloride-propylene copolymers
Assignee: Airco Inc
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Filing: 1964-12-31
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Granted: 1969-09-23
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Charles A Heiberger
- 👤 Leon Fishbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:39
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB578584A
Cited
GB578992A
Cited
US2422392A
Cited
GB767417A
Cited
US2875187A
Cited
US3145194A
Cited
GB961254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |