US3000901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration of pentaerythritol
Assignee: Trojan Powder Co
•
Filing: 1959-05-04
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Granted: 1961-09-19
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Expires: 1979-05-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Wyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:18
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/132; B; B28; B28D; B28D1/00; B28D1/32; B28D1/322; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20; C07C43/135; C07D; C07D305/00; C07D305/02; C07D305/04; C07D305/06; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/46; C08G63/48; C08G63/66; C08G63/668
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
THE METHOD OF THE DEHYDRATION OF A PENTAERYTHRITOL TO PROVIDE A COMPLETELY WATER-SOLUBLE, LOW MOLECULAR WEIGHT DEHYDRATION PRODUCT OF ENHANCED BODYING POWER WHICH IS SUBSTANTIALLY FREE OF ALDEHYDE AND DOUBLE BOND MATERIAL WHICH COMPRISES HEATING A MIXTURE OF A PENTAERYTHRITOL SELECTED FROM THE CLASS CONSISTING OF MONOPENTAERYTHRITOL, DIPENTAERYTHRITOL, AND TRIPENTAERYTHRITOL WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF STANNOUS CHLORIDE, MAGNESIUM CHLORIDE, AND MAGNESIUM BROMIDE, IN A PROPORTION OF FROM ABOUT 0.01% TO NOT EXCEEDING 0.25% BY WEIGHT OF THE MIXTURE, CALCULATED ON THE WEIGHT OF THE SAID CATALYST AS THE HYDRATE THEREOF, TO A TEMPERATURE BELOW ABOUT 290*C., EFFECTIVE TO LIBERATE WATER OF CONSTITUTION OF THE SAID PENTAERTHRITOL UNTIL SAID WATER OF CONSTITUTION IN AN AMOUNT OF FROM ABOUT 3% TO ABOUT 10% WEIGHT OF THE MIXTURE HAS BEEN EVOLVED FROM SAID MIXTURE.
Claim 2
Independent Claim
135 words
THE METHOD OF THE DEHYDRATION OF A PENTAERYTHRITOL TO PROVIDE A COMPLETELY WATER-SOLUBLE, LOW MOLECULAR WEIGHT DEHYDRATION PRODUCT OF ENHANCED BODYING POWER WHICH IS SUBSTANTIALLY FREE OF ALDEHYDE AND DOUBLE BOND MATERIAL WHICH COMPRISES HEATING A MIXTURE OF A PENTAERYTHRITOL SELECTED FROM THE CLASS CONSISTING OF MONOPENTAERYTHRITOL, DIPENTAERYTHRITOL, AND TRIPENTAERYTHRITOL WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF STANNOUS CHLORIDE, MAGNESIUM CHLORIDE, AND MAGNESIUM BROMIDE, IN A PROPORTION OF FROM ABOUT 0.01% TO NOT EXCEEDING 0.25% BY WEIGHT OF THE MIXTURE, CALCULATED ON THE WEIGHT OF THE SAID CATALYST AS THE HYDRATE THEREOF, TO A TEMPERATURE BELOW ABOUT 290*C., EFFECTIVE TO LIBERATE WATER OF CONSTITUTION OF THE SAID PENTAERTHRITOL UNTIL SAID WATER OF CONSTITUTION IN AN AMOUNT OF FROM ABOUT 3% TO ABOUT 10% WEIGHT OF THE MIXTURE HAS BEEN EVOLVED FROM SAID MIXTURE.
Claim 3
Dependent Claim
8 words
THE PRODUCT OF THE PROCESS OF CLAIM 1.
References Cited (Backward Citations)
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Cited
US2462048A
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US2462049A
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US2465776A
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US2651663A
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US2468722A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |