US3490926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition in fuel fired equipment
Assignee: Canadian Patents and Development Ltd
•
Filing: 1969-06-02
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Granted: 1970-01-20
•
Expires: 1989-06-02
Abstract
No abstract record available.
Inventors
- 👤 George K Lee
- 👤 Earland R Mitchell
- 👤 Andrew T Mccord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:02
CPC Classifications
C; C23; C23F; C23F15/00; C09; C09D; C09D1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3306135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |