US2768212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition of acetals and ketals to olefins
Assignee: GAF Chemicals Corp
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Filing: 1951-06-29
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Granted: 1956-10-23
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Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 John W Copenhaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:13
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; C07C319/00; C07C319/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS OF PREPARING DIETHERSE OF GLYCOLS IN WHICH THE HYDROXYL GROUPS ARE ATTACHED TO TWO CONSECUTIVE ALTERNATE CARBON ATOMS IN A CARBON CHAIN COMPRISING REACTING EQUIMOLAR AMOUNTS OF A MEMBER OF THE GROUP CONSISTING OF STYRENE, INSOBUTYLENE, POLYBUTYLENES AND POLYPROLYLENES, AND A MEMBER OF THE GROUP CONSISTINGG OF FORMALS, ACETALS, KETALS AND SULFUR ANALOGS THEREOF UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PRESENCE OF AN ACID-REACTING CONDENSING AGENT SELECTED FROM THE GROUP CONSISTING OF BORON FLUORIDE, BORON TRICHLORIDE, STANNIC CHLORIDE, GALLIUM TRICHLORIDE, TITANIUM CHLORIDE, P-TOLUENE SULFONIC ACID AND SULFURIC ACID.
Claim 2
Dependent Claim
90 words
A PROCESS OF PREPARING DIETHERSE OF GLYCOLS IN WHICH THE HYDROXYL GROUPS ARE ATTACHED TO TWO CONSECUTIVE ALTERNATE CARBON ATOMS IN A CARBON CHAIN COMPRISING REACTING EQUIMOLAR AMOUNTS OF A MEMBER OF THE GROUP CONSISTING OF STYRENE, INSOBUTYLENE, POLYBUTYLENES AND POLYPROLYLENES, AND A MEMBER OF THE GROUP CONSISTINGG OF FORMALS, ACETALS, KETALS AND SULFUR ANALOGS THEREOF UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PRESENCE OF AN ACID-REACTING CONDENSING AGENT SELECTED FROM THE GROUP CONSISTING OF BORON FLUORIDE, BORON TRICHLORIDE, STANNIC CHLORIDE, GALLIUM TRICHLORIDE, TITANIUM CHLORIDE, P-TOLUENE SULFONIC ACID AND SULFURIC ACID.
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |