US2807585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibitor acid
Assignee: Henkel Corp
•
Filing: 1953-12-02
•
Granted: 1957-09-24
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Expires: 1973-12-02
Abstract
No abstract record available.
Inventors
- 👤 George S Gardner
- 👤 Albert J Saukaitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:35
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/48; C07D211/02; C07D211/52; C23; C23F; C23F11/00; C23F11/04; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AN ACID CORROSIVE TO METALS CONTAINING, AS AN INHIBITING AGENT, THE REACTION PRODUCT FORMED BY HEATING AT TEMPERATURES OF FROM 60*C. TO 150*C. FOR A PERIOD OF TIME OF FROM FIVE MINUTES TO TWENTY-FOUR HOURS A SUBSTITUTED 4-HYDROXY PIPERIDINE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
43 words
AN ACID CORROSIVE TO METALS CONTAINING, AS AN INHIBITING AGENT, THE REACTION PRODUCT FORMED BY HEATING AT TEMPERATURES OF FROM 60*C. TO 150*C. FOR A PERIOD OF TIME OF FROM FIVE MINUTES TO TWENTY-FOUR HOURS A SUBSTITUTED 4-HYDROXY PIPERIDINE HAVING THE GENERAL FORMULA:
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) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |