US2992187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing rust
Assignee: Pfister Chemical Works Inc
•
Filing: 1958-04-18
•
Granted: 1961-07-11
•
Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Gershon Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:26
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2615846A
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US2767146A
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US2650875A
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US2653860A
Cited
US2653861A
Cited
US2739883A
Cited
US2882135A
Cited
US2839370A
Cited
US2830942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |