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Patent US3793221A successfully refreshed from Google Patents.
US3793221A
Expired / Lapsed
US
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Thickened acid cleaner
Assignee: Diversey Wyandotte Corp
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Filing: 1972-09-13
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Granted: 1974-02-19
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Expires: 1992-09-13
Abstract
Abstract A THICKENED ACID CLEANER CONCENTRATE COMPOSITION COMPRISING AN AQUEOUS HYDROCHLORIC ACID, AN ORGANIC ACID, E.G. OXIALIC, A NONIONIC SURFACTANT, AN ANIONIC SURFACTANT AND WATER IS USEFUL IN CLEANING VEHICLES SUCH AS RAILROAD ROLLING STOCK EQUIPMENT WITHOUT SUBSEQUENT NEUTRALIZATION.
Inventors
- 👤 J Otrhalek
- 👤 R Gansser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:58
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/042; C11D1/00; C11D1/66; C11D1/83; C11D3/16; C11D3/20; C11D3/2075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |