US3418277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage process for making sulfone polymers
Assignee: Monsanto Co
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Filing: 1966-10-18
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Granted: 1968-12-24
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Expires: 1986-10-18
Abstract
No abstract record available.
Inventors
- 👤 Saul M Cohen
- 👤 Jr Raymond H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:30
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/41; C07C309/42; C07C317/00; C07C317/16; C07C317/22; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C08; C08G; C08G75/00; C08G75/20
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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |