Patent US3183191A successfully refreshed from Google Patents.
US3183191A
Expired / Lapsed
US
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Stain and rust removing composition
Assignee: Hach Co
•
Filing: 1960-04-19
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Granted: 1965-05-11
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Expires: 1980-04-19
Abstract
No abstract record available.
Inventors
- 👤 Clifford C Hach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:55
CPC Classifications
F; F28; F28G; F28G9/00; B; B01; B01J; B01J49/00; B01J49/60
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
A RUST STAIN REMOVING COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 40% BY WEIGHT SODIUM HYDROSULFITE AND ABOUT 60% BY WEIGHT SODIUM BISULFITE.
Claim 2
Dependent Claim
21 words
A RUST STAIN REMOVING COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 40% BY WEIGHT SODIUM HYDROSULFITE AND ABOUT 60% BY WEIGHT SODIUM BISULFITE.
Claim 3
Dependent Claim
28 words
A COMPOSITION CONSISTING ESSENTIALLY OF SURFACE ACTIVE AGENT AN AMOUNT OF FROM ABOUT 0.5 TO ABOUT 20% BY WEIGHT OF THE RUST STAIN REMOVING COMPOSITION OF CLAIM 1.
References Cited (Backward Citations)
US777669A
Cited
US1151416A
Cited
FR666932A
Cited
US1918873A
Cited
US2273799A
Cited
US2393865A
Cited
US2995522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |