US3514273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel oil additive
Assignee: Canadian Patents and Development Ltd
•
Filing: 1968-11-25
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Granted: 1970-05-26
•
Expires: 1988-11-25
Abstract
No abstract record available.
Inventors
- 👤 George K Lee
- 👤 Earland R Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:28
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/12; C10L1/1233; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; C10L1/19; C10L1/191
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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |