US3518098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal protecting preparations
Assignee: J Goddard and Sons Ltd
•
Filing: 1964-06-23
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Granted: 1970-06-30
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Expires: 1984-06-23
Abstract
No abstract record available.
Inventors
- 👤 Ian Alastair Moncrieff Ford
- 👤 Bernard Carlton Cox
- 👤 James Coward Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:14
CPC Classifications
C; C09; C09G; C09G1/00; C09G1/02; C11; C11D; C11D3/00; C11D3/16; C11D3/34; C11D3/3472; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C23F11/161; C23G; C23G1/00; C23G1/02; C23G1/10; C11D3/3427
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A CLEANING, POLISHING OR COATING COMPOSITION FOR PROTECTING METAL SURFACES CONTAINIG SILVER, COPPER OR NICKEL, THE IMPROVEMENT WHICH COMPRISES THE ADDITION OF AN ESTER OF A MERCAPTO CARBOXYLIC ACID OF THE FORMULA HSCNH2N-C-OO-R WHEREIN N IS 1 OR 2 AND R IS CNH2N+1 WHEREIN N IS 8 TO 22, IN AN AMOUNT SUFFICIENT TO PROTECT THE METAL SURFACE AGAINST TARNISHING.
Claim 2
Dependent Claim
61 words
IN A CLEANING, POLISHING OR COATING COMPOSITION FOR PROTECTING METAL SURFACES CONTAINIG SILVER, COPPER OR NICKEL, THE IMPROVEMENT WHICH COMPRISES THE ADDITION OF AN ESTER OF A MERCAPTO CARBOXYLIC ACID OF THE FORMULA HSCNH2N-C-OO-R WHEREIN N IS 1 OR 2 AND R IS CNH2N+1 WHEREIN N IS 8 TO 22, IN AN AMOUNT SUFFICIENT TO PROTECT THE METAL SURFACE AGAINST TARNISHING.
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) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |