Patent US3335089A successfully refreshed from Google Patents.
US3335089A
Expired / Lapsed
US
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Hydrogen-embrittlement-inhibition with propargyl benzylamine and alkyl pyridines
Assignee: Airco Inc
•
Filing: 1964-04-15
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Granted: 1967-08-08
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Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Davidowich George
- 👤 Morton W Leeds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:39
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/068; C23F; C23F11/00; C23F11/04; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
AN AQUEOUS SOLUTION OF SULFURIC ACID CONTAINING AN EFFECTIVE HYDROGEN-EMBRITTLEMENT-INHIBITING AMOUNT OF PROPARGYLBENZYLAMINE AND A LOWER ALKYL PYRIDINE IN THE RATIO OF ABOUT 2:1 TO 1:2.
Claim 2
Dependent Claim
26 words
AN AQUEOUS SOLUTION OF SULFURIC ACID CONTAINING AN EFFECTIVE HYDROGEN-EMBRITTLEMENT-INHIBITING AMOUNT OF PROPARGYLBENZYLAMINE AND A LOWER ALKYL PYRIDINE IN THE RATIO OF ABOUT 2:1 TO 1:2.
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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |