US3446765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid compositions comprising polyvinyl chloride,calcium carbonate and an oxide or hydroxide
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1966-02-28
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Granted: 1969-05-27
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Walter Reading Pryer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:24
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2403215A
Cited
US2663695A
Cited
US3310522A
Cited
US3268623A
Cited
US3261793A
Cited
US3362924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |