US3491068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel copolymers and their method of preparation
Assignee: GE Chemicals Inc
•
Filing: 1967-06-16
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Granted: 1970-01-20
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Expires: 1987-06-16
Abstract
No abstract record available.
Inventors
- 👤 Norman G Gaylord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:54
CPC Classifications
C; C08; C08F; C08F22/00; C08F22/04; C08F236/00; C08F236/02; C08F236/04
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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |