US2662808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition with nitrobenzaldehydes
Assignee: Shell Development Co
•
Filing: 1949-05-02
•
Granted: 1953-12-15
•
Expires: 1969-05-02
Abstract
No abstract record available.
Inventors
- 👤 Wilfrid W Newschwander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A SUBSTANTIALLY SOLID SHEET PACKAGING MATERIAL CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ISOMERIC NITROBENZALDEHYDES AND THE LOWER ALKYL DERIVATIVES THEREOF IN AN AMOUNT OF BETWEEN ABOUT 0.01 GRAM AND ABOUT 5 GRAMS PER SQUARE FOOT OF SAID SUBSTANTIALLY SOLID SHEET PACKAGING MATERIAL.
Claim 2
Dependent Claim
45 words
A SUBSTANTIALLY SOLID SHEET PACKAGING MATERIAL CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ISOMERIC NITROBENZALDEHYDES AND THE LOWER ALKYL DERIVATIVES THEREOF IN AN AMOUNT OF BETWEEN ABOUT 0.01 GRAM AND ABOUT 5 GRAMS PER SQUARE FOOT OF SAID SUBSTANTIALLY SOLID SHEET PACKAGING MATERIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |