US3002012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of normal lead styphnate
Assignee: Olin Corp
•
Filing: 1958-01-16
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Granted: 1961-09-26
•
Expires: 1978-01-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Backensto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:49
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/12; C07F; C07F7/00; C07F7/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD FOR THE PREPARATION OF NORMAL LEAD STYPHNATE WHICH COMPRISES INTERMIXING A GLYCERIN SOLUTION OF A LEAD SALT SELECTED FROM THE GROUP CONSISTING OF LEAD ACETATE AND LEAD NITRATE WITH A SOLUTION OF STYPHNIC ACID IN A SOLVENT THAT IS MISCIBLE WITH GLYCERIN AND WATER, IN THE PRESENCE OF ACETIC ANHYDRIDE, THE REACTION MIXTURE HAVING A PH BELOW ABOUT 4.5 AND SUBSEQUENTLY ADDING WATER TO THE REACTION MIXTURE.
Claim 2
Independent Claim
69 words
A METHOD FOR THE PREPARATION OF NORMAL LEAD STYPHNATE WHICH COMPRISES INTERMIXING A GLYCERIN SOLUTION OF A LEAD SALT SELECTED FROM THE GROUP CONSISTING OF LEAD ACETATE AND LEAD NITRATE WITH A SOLUTION OF STYPHNIC ACID IN A SOLVENT THAT IS MISCIBLE WITH GLYCERIN AND WATER, IN THE PRESENCE OF ACETIC ANHYDRIDE, THE REACTION MIXTURE HAVING A PH BELOW ABOUT 4.5 AND SUBSEQUENTLY ADDING WATER TO THE REACTION MIXTURE.
References Cited (Backward Citations)
US2295104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |