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Patent US3337550A successfully refreshed from Google Patents.
US3337550A
Expired / Lapsed
US
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Process for preparing triazines and imidazoles
Assignee: Shell USA Inc
•
Filing: 1964-06-01
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Granted: 1967-08-22
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Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Yates John
- 👤 Haddock Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:50
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/68; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6515; C07F9/6521
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
8 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |