Patent US3557078A successfully refreshed from Google Patents.
US3557078A
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US
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Method for treating and improving the properties of proteinaceous matter comprising reacting hide material with hcho and a malonic acid
Assignee: United States Department of Agriculture
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Filing: 1969-10-27
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Granted: 1971-01-19
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Expires: 1989-10-27
Abstract
Abstract PROTEINACEOUS MATTER SUCH AS COLLAGEN OF ANIMAL ORIGIN IS TREATED WITH FORMALDEHYDE AND MALONIC OR A SUBSTITUTED MALONIC ACID TO PRODUCE A CHEMICALLY MODIFIED SUBSTANCE HAVING IMPROVED ABILITY TO BIND AND UTILIZE MINERAL TANNING AGENTS. WHEN THE PROTEINACEOUS MATTER IS COLLAGEN FROM ANIMAL HIDES AND SKINS, RETANNING OF THE MODIFIED COLLAGEN WITH CONVENTIONAL MINERAL TANNING AGENTS PRODUCES A HIGH QUALITY LEATHER PRODUCT WITH IMPROVED HYDROTHERMAL STABILITY AND RESISTANCE TO DETERIORATION.
Inventors
- 👤 Stephen H Feairheller
- 👤 Maryann M Taylor
- 👤 Edward M Filachione
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:48
CPC Classifications
C; C14; C14C; C14C3/00; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/842
Claims Analysis
Total Claims: 0
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |