US3468857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting polymers of unsaturated acetals
Assignee: NL SPENCER KELLOG Inc
•
Filing: 1965-10-04
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Granted: 1969-09-23
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Richard B Graver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:01
CPC Classifications
C; C09; C09D; C09D137/00; C08; C08F; C08F20/00; C08F24/00; C08L; C08L29/00; C08L29/14
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) | 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 |