US3516947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts having stable free radicals containing sulfur
Assignee: Canadian Patents and Development Ltd
•
Filing: 1967-05-04
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Granted: 1970-06-23
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Expires: 1987-05-04
Abstract
No abstract record available.
Inventors
- 👤 Zdzislaw F Dudzik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:50
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/02; C07C4/06; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/082; B01J29/70; B01J29/7003; B01J37/00; B01J37/20; C09; C09C; C09C1/00; C09C1/28; C09C1/32; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G49/00; C10G49/02; C10G49/08; B01J2229/00; B01J2229/30; B01J2229/40; C01; C01P; C01P2002/00; C01P2002/80; C01P2002/86; C01P2006/00; C01P2006/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2402683A
Cited
US2402684A
Cited
US2402626A
Cited
GB643459A
Cited
GB1029304A
Cited
US3337447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |