US3461918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion protection
Assignee: Phillips Petroleum Co
•
Filing: 1966-08-29
•
Granted: 1969-08-19
•
Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 Robert V Gerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:16
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; F16L58/1063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1737270A
Cited
US1792941A
Cited
US2982311A
Cited
US2982360A
Cited
US3040760A
Cited
US3255821A
Cited
US3192612A
Cited
US3280911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |