US2687346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for brightening the skin of aircraft
Assignee: KELITE PRODUCTS Inc
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Filing: 1953-04-24
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Granted: 1954-08-24
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Expires: 1973-04-24
Abstract
No abstract record available.
Inventors
- 👤 Mcdonald Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A PROCESS OF BRIGHTENING THE ALUMINUM OR ALUMINUM ALLOY SKINS OF AIRCRAFT WHICH COMPRISES, TREATING THE SKINS OF AIRCRAFT WITH AN AQUEOUS SOLUTION CONTAINING ESSENTIALLY POLYSTYRENE SULFONIC ACID, A SEQUESTERING AGENT, HY DROFLUORIC, ACID PHOSPHORIC ACID, AND AN ARYL SULFONIC ACID, THE SEQUESTERING AGENT COMPRISING A WATER SOLUBLE ALIPHATIC HYDROXY CARBOXYLIC ACID, AND THE ARYL SULFONIC ACID CONTAINING LESS THAN 4 ALKYL CARBON ATOMS.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |