Patent US3057808A successfully refreshed from Google Patents.
US3057808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon-nitrogen polymers and preparation thereof
Assignee: Pure Oil Co
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Filing: 1960-03-22
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Granted: 1962-10-09
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Expires: 1980-03-22
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Walter J Sandner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:29
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0683; C08G73/0694; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF PREPARING CARBON-NITROGEN POLYMERS WHICH COMPRISES REACTING A WATER-SOLUBLE CYANIDE SALT WITH A WATER-SOLUBLE ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF ACETIC ACID, CHLORACETIC ACID, FORMIC ACID, MALONIC ACID AND GLUTARIC ACID, IN AQUEOUS SOLUTION, AT A RATIO OF CYANIDE EQUIVALENT-TO-ACID IN THE RANGE FROM ABOUT 0.5 TO 3.0, AT AMBIENT TEMPERATURE, FOR A TIME SUFFICIENT TO EFFECT THE FORMATION OF A BLACK, SOLID POLYMER, AND RECOVERING THE POLYMER FROM SAID SOLUTION.
Claim 2
Independent Claim
75 words
A METHOD OF PREPARING CARBON-NITROGEN POLYMERS WHICH COMPRISES REACTING A WATER-SOLUBLE CYANIDE SALT WITH A WATER-SOLUBLE ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF ACETIC ACID, CHLORACETIC ACID, FORMIC ACID, MALONIC ACID AND GLUTARIC ACID, IN AQUEOUS SOLUTION, AT A RATIO OF CYANIDE EQUIVALENT-TO-ACID IN THE RANGE FROM ABOUT 0.5 TO 3.0, AT AMBIENT TEMPERATURE, FOR A TIME SUFFICIENT TO EFFECT THE FORMATION OF A BLACK, SOLID POLYMER, AND RECOVERING THE POLYMER FROM SAID SOLUTION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |