US3094469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cleaning metal objects
Assignee: DEHYDAG DEUTSCHE HYDRIERWERKE G M B H
•
Filing: 1959-07-06
•
Granted: 1963-06-18
•
Expires: 1979-07-06
Abstract
No abstract record available.
Inventors
- 👤 Strauss Wennemar
- 👤 Wedell Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:05
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5018; C23; C23G; C23G5/00; C23G5/02; C25; C25F; C25F1/00; C11D2111/00; C11D2111/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
66 words
A PROCESS FOR CLEANSING METAL SURFACES BY THE USE OF CHLOROHYDROCARBON SOLVENTS AND AQUEOUS CLEANSING AGENT SOLUTIONS, IN A CLEANING BATH COMPRISING A LOWER LAYER OF SAID CHLOROHYDROCARBON SOLVENT AND AN UPPER LAYER OF SAID AQUEOUS CLEANSING AGENT SOLUTION, THE STEPS COMPRISING TREATING SAID METAL SURFACES FIRST IN SAID CHLOROHYDROCARBON SOLVENT LAYER AND SUBSEQUENTLY IN SAID AQUEOUS CLEANSING AGENT SOLUTION AND THEREAFTER RINSING SAID METAL SURFACES.
Claim 2
Dependent Claim
66 words
A PROCESS FOR CLEANSING METAL SURFACES BY THE USE OF CHLOROHYDROCARBON SOLVENTS AND AQUEOUS CLEANSING AGENT SOLUTIONS, IN A CLEANING BATH COMPRISING A LOWER LAYER OF SAID CHLOROHYDROCARBON SOLVENT AND AN UPPER LAYER OF SAID AQUEOUS CLEANSING AGENT SOLUTION, THE STEPS COMPRISING TREATING SAID METAL SURFACES FIRST IN SAID CHLOROHYDROCARBON SOLVENT LAYER AND SUBSEQUENTLY IN SAID AQUEOUS CLEANSING AGENT SOLUTION AND THEREAFTER RINSING SAID METAL SURFACES.
Claim 3
Dependent Claim
22 words
THE PROCESS OF CLAIM 1 WHEREIN THE CLEANING IN THE AQUEOUS LAYER IS CARRIED OUT UNDER THE ACTION OF AN ELECTRIC CURRENT.
References Cited (Backward Citations)
US781230A
Cited
US1004673A
Cited
US2077332A
Cited
US2313422A
Cited
US2372599A
Cited
DE725186C
Cited
US2487399A
Cited
US2556017A
Cited
US2683692A
Cited
US2653883A
Cited
US2953507A
Cited
US2778791A
Cited
US2957782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |