US2564414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer for bichromated colloids
Assignee: Interchemical Corp
•
Filing: 1949-05-14
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Granted: 1951-08-14
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Expires: 1969-05-14
Abstract
No abstract record available.
Inventors
- 👤 Paul J Whyzmuzis
- 👤 William O Kaupp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:45
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A DEVELOPER FOR BICHROMATED WATER SOLUBLE COLLOID COATINGS COMPRISING A CONCENTRATED AQUEOUS SOLUTION OF CALCIUM CHLORIDE AND ZINC CHLORIDE IN A WEIGHT RATIO BETWEEN 3 TO 2 AND 1 TO 1, AND FROM 1 TO 3% BY WEIGHT OF HYDROXY-ACETIC ACID.
Claim 2
Dependent Claim
41 words
A DEVELOPER FOR BICHROMATED WATER SOLUBLE COLLOID COATINGS COMPRISING A CONCENTRATED AQUEOUS SOLUTION OF CALCIUM CHLORIDE AND ZINC CHLORIDE IN A WEIGHT RATIO BETWEEN 3 TO 2 AND 1 TO 1, AND FROM 1 TO 3% BY WEIGHT OF HYDROXY-ACETIC 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) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |