US2801941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning railway cars and the like
Assignee: Dearborn Chemical Co
•
Filing: 1955-05-27
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Granted: 1957-08-06
•
Expires: 1975-05-27
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:08
CPC Classifications
B; B60; B60S; B60S3/00; B60S3/04; B01; B01J; B01J47/00; B01J47/14; B01J47/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN THE PROCESS OF WASHING RAILWAY CARS AND THE LIKE IN WHICH SAID CARS ARE WASHED BY SPRAYING WITH AN AQUEOUS SOLUTION OF A SURFACE ACTIVE AGENT, FOLLOWED BY A RINSING WITH TAP WATER, THE IMPROVEMENT WHICH COMPSRISES REMOVING STREAKS WHICH REMAIN AFTER SAID RINSING BY RINSING SAID CARS WITH A DEMINERALIZED WATER.
Claim 2
Dependent Claim
53 words
IN THE PROCESS OF WASHING RAILWAY CARS AND THE LIKE IN WHICH SAID CARS ARE WASHED BY SPRAYING WITH AN AQUEOUS SOLUTION OF A SURFACE ACTIVE AGENT, FOLLOWED BY A RINSING WITH TAP WATER, THE IMPROVEMENT WHICH COMPSRISES REMOVING STREAKS WHICH REMAIN AFTER SAID RINSING BY RINSING SAID CARS WITH A DEMINERALIZED WATER.
References Cited (Backward Citations)
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Cited
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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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |