US3114657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for cleaning and stripping metals
Assignee: Individual
•
Filing: 1960-08-29
•
Granted: 1963-12-17
•
Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 John W Stilwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:47
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/44; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A COMPOSITION OF MATTER FOR SURFACE-CLEANING METALS, COMPRISING AN ACID WHICH IS NORAMALLY CORROSIVE TO THE METAL TO BE CLEANED, A FIRST INHIBITOR CONSISTING OF A DITERTIARY ACETYLENIC GLYCOL HAVING THE GENERAL STRUCTURE:
Claim 2
Dependent Claim
33 words
A COMPOSITION OF MATTER FOR SURFACE-CLEANING METALS, COMPRISING AN ACID WHICH IS NORAMALLY CORROSIVE TO THE METAL TO BE CLEANED, A FIRST INHIBITOR CONSISTING OF A DITERTIARY ACETYLENIC GLYCOL HAVING THE GENERAL STRUCTURE:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |