Patent US5068260A successfully refreshed from Google Patents.
Patent US3228816A successfully refreshed from Google Patents.
US3228816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for cleaning and polishing aluminum and its alloys
Assignee: Rohr Inc
•
Filing: 1962-02-21
•
Granted: 1966-01-11
•
Expires: 1982-02-21
Abstract
No abstract record available.
Inventors
- 👤 Earl W Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:26
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A DRY MIX ADDITIVE TO FORM A HOT AQUEOUS SOLUTION CONTAINING 2.0-5.0% NITRIC ACID FOR CLEANING AND IMPARTING HIGH GLOSS TO THE SURFACES OF ALUMINUM AND ITS ALLOYS CONSISTING OF UREA, A FLUO COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER SOLUBLE ALKALI METAL FLUORIDES, FLUOSILICATES AND FLUOBORATES AND A BORIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND WATER SOLUBLE SALTS THEREOF, SAID UREA AND BORIC AND FLUO COMPOUNDS BEING IN AMOUNT EQUIVALENT TO FORM IN THE SOLUTION ABOUT 0.1 TO 1.0% BY WEIGHT OF UREA, 2 TO 50 PARTS BY WEIGHT OF BORIC ACID TO 1 PART BY WEIGHT OF HYDROFLUORIC ACID CALCULATED AS AMMONIUM BIFLUORIDE, SAID FLUO COMPOUND BEING IN AMOUNT SUCH THAT THE HYDROFLUORIC ACID CALCULATED AS AMMONIUM BIFLUORIDE HAS A VOLUME TO WEIGHT RATIO OF ABOUT 10 TO 1 BETWEEN THE NITRIC ACID AND AMMONIUM BIFLUORIDE.
Claim 2
Dependent Claim
143 words
A DRY MIX ADDITIVE TO FORM A HOT AQUEOUS SOLUTION CONTAINING 2.0-5.0% NITRIC ACID FOR CLEANING AND IMPARTING HIGH GLOSS TO THE SURFACES OF ALUMINUM AND ITS ALLOYS CONSISTING OF UREA, A FLUO COMPOUND SELECTED FROM THE GROUP CONSISTING OF WATER SOLUBLE ALKALI METAL FLUORIDES, FLUOSILICATES AND FLUOBORATES AND A BORIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND WATER SOLUBLE SALTS THEREOF, SAID UREA AND BORIC AND FLUO COMPOUNDS BEING IN AMOUNT EQUIVALENT TO FORM IN THE SOLUTION ABOUT 0.1 TO 1.0% BY WEIGHT OF UREA, 2 TO 50 PARTS BY WEIGHT OF BORIC ACID TO 1 PART BY WEIGHT OF HYDROFLUORIC ACID CALCULATED AS AMMONIUM BIFLUORIDE, SAID FLUO COMPOUND BEING IN AMOUNT SUCH THAT THE HYDROFLUORIC ACID CALCULATED AS AMMONIUM BIFLUORIDE HAS A VOLUME TO WEIGHT RATIO OF ABOUT 10 TO 1 BETWEEN THE NITRIC ACID AND AMMONIUM BIFLUORIDE.
Claim 3
Dependent Claim
67 words
A LIQUID CONCENTRATE TO BE ADDED TO WATER IN THE PREPARATION OF A HOT AQUEOUS SOLUTION FOR IMPARTING A HIGH GLOSS TO ARTICLES OF ALUMINUM AND ITS ALLOYS IMMERSED IN SAID SOLUTION AND CONSISTING OF THE FOLLOWING PERCENTAGES OF ULTIMATE SOLUTION BY WEIGHT: PERCENT NH2CONH2 0.1 TO 1.0 HF (CALCULATED AS NH4F.HF) .2 TO .5 H3BO3 1.0 TO 10.0 HNO3 12.0 TO 25.0 (16 TO 20% ACID)
Claim 4
Dependent Claim
67 words
A LIQUID CONCENTRATE TO BE ADDED TO WATER IN THE PREPARATION OF A HOT AQUEOUS SOLUTION FOR IMPARTING A HIGH GLOSS TO ARTICLES OF ALUMINUM AND ITS ALLOYS IMMERSED IN SAID SOLUTION AND CONSISTING OF THE FOLLOWING PERCENTAGES OF ULTIMATE SOLUTION BY WEIGHT: PERCENT NH2CONH2 0.1 TO 1.0 HF (CALCULATED AS NH4F.HF) .2 TO .5 H3BO3 1.0 TO 10.0 HNO3 12.0 TO 25.0 (16 TO 20% ACID)
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |