US2687965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion preventive composition
Assignee: Shell Development Co
•
Filing: 1950-05-01
•
Granted: 1954-08-31
•
Expires: 1970-05-01
Abstract
No abstract record available.
Inventors
- 👤 Knapel F Schiermeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:01
CPC Classifications
C; C09; C09D; C09D195/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A COMPOSITION OF MATTER ADAPTED FOR USE AS A RUST INHIBITOR FOR METALS CONTAINING THE FOLLOWING CONSTITUENTS IN THE FOLLOWING PROPORTIONS: NON-AIR BLOWN, PROPANE PRECIPITATED PETR
Claim 2
Dependent Claim
26 words
A COMPOSITION OF MATTER ADAPTED FOR USE AS A RUST INHIBITOR FOR METALS CONTAINING THE FOLLOWING CONSTITUENTS IN THE FOLLOWING PROPORTIONS: NON-AIR BLOWN, PROPANE PRECIPITATED PETR
References Cited (Backward Citations)
US2392497A
Cited
US2250185A
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US2545137A
Cited
US2596101A
Cited
US2485321A
Cited
US2560202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |