Patent US2639971A successfully refreshed from Google Patents.
US2639971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting storage tank corrosion
Assignee: Standard Oil Development Co
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Filing: 1949-01-29
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Granted: 1953-05-26
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Expires: 1969-01-29
Abstract
No abstract record available.
Inventors
- 👤 Alvin C Broyles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:20
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
METHOD FOR MINIMIZING CORROSION IN A METAL VESSEL WHICH HAS A VAPOR SPACE AND CARRIES A MATERIAL EVOLVING ACIDIC VAPORS WHICH COMPRISES MAINTAINING IN SAID VAPOR SPARE A VOLATILE NITROPARAFFIN SELECTED FROM THE CLASS CONSISTING OF NITROMETHANE, NITROETHANE, AND NITROPROPANE.
Claim 2
Dependent Claim
40 words
METHOD FOR MINIMIZING CORROSION IN A METAL VESSEL WHICH HAS A VAPOR SPACE AND CARRIES A MATERIAL EVOLVING ACIDIC VAPORS WHICH COMPRISES MAINTAINING IN SAID VAPOR SPARE A VOLATILE NITROPARAFFIN SELECTED FROM THE CLASS CONSISTING OF NITROMETHANE, NITROETHANE, AND NITROPROPANE.
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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |