US2708169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-resistant animal glue
Assignee: Armour and Co
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Filing: 1952-04-05
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Granted: 1955-05-10
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Expires: 1972-04-05
Abstract
No abstract record available.
Inventors
- 👤 Harvard L Keil
- 👤 Louise K Fencil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
C; C09; C09H; C09H7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE PREPARATION OF WATER RESISTANT GLUE, THE STEPS OF TREATING SOLID, HYDRATED ANIMAL GLUE WITH AN EXCESS OF CARBON DISULFIDE TO DECREASE THE REACTION RATE OF THE PROTEIN MOLECULES IN SAID GLUE WITH FORMALDEHYDE BY BLOCKING THE FREE AMINO GROUPS IN SAID PROTEIN MOLE CULES, FORMING A VISCOUS SUSPENSION OF THE TREATED GLUE IN WATER, ADDING SUFFICIENT ETHYLENE CHLOROHYDRIN TO SAID SUSPENSION TO KEEP SAID SUSPENSION IN FLUID CONDITION AT ROOM TEMPERATURE, AND FINALLY MIXING WITH SAID SUSPENSION A FORMALDEHYDE-LIBERATING MATERIAL, SAID FORMALDEHYDE-LIBERATING MATERIAL PROVIDING ABOUT 10% BY WEIGHT OF FORMALDEHYDE COMPARED TO THE WEIGHT OF THE GLUE SOLIDS.
Claim 2
Dependent Claim
100 words
IN THE PREPARATION OF WATER RESISTANT GLUE, THE STEPS OF TREATING SOLID, HYDRATED ANIMAL GLUE WITH AN EXCESS OF CARBON DISULFIDE TO DECREASE THE REACTION RATE OF THE PROTEIN MOLECULES IN SAID GLUE WITH FORMALDEHYDE BY BLOCKING THE FREE AMINO GROUPS IN SAID PROTEIN MOLE CULES, FORMING A VISCOUS SUSPENSION OF THE TREATED GLUE IN WATER, ADDING SUFFICIENT ETHYLENE CHLOROHYDRIN TO SAID SUSPENSION TO KEEP SAID SUSPENSION IN FLUID CONDITION AT ROOM TEMPERATURE, AND FINALLY MIXING WITH SAID SUSPENSION A FORMALDEHYDE-LIBERATING MATERIAL, SAID FORMALDEHYDE-LIBERATING MATERIAL PROVIDING ABOUT 10% BY WEIGHT OF FORMALDEHYDE COMPARED TO THE WEIGHT OF THE GLUE SOLIDS.
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) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |