US3330672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver antitarnish compositions
Assignee: Philip A Hunt Chemical Corp
•
Filing: 1964-06-29
•
Granted: 1967-07-11
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Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 Kroll Harry
- 👤 Jr Alderic R Therrien
- 👤 Phyllis W Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
C; C23; C23G; C23G1/00; C23F; C23F11/00; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A COMPOSITION WHEREIN ACTIVE INGREDIENTS CONSIST ESSENTIALLY OF 3.1-10 PARTS OF A MERCAPTO ESTER HAVING THE STRUCTURE
Claim 2
Dependent Claim
17 words
A COMPOSITION WHEREIN ACTIVE INGREDIENTS CONSIST ESSENTIALLY OF 3.1-10 PARTS OF A MERCAPTO ESTER HAVING THE STRUCTURE
References Cited (Backward Citations)
US2841501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |