US3108993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of vinyl chloride
Assignee: Hercules Powder Co
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Filing: 1956-10-24
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Granted: 1963-10-29
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Expires: 1976-10-24
Abstract
No abstract record available.
Inventors
- 👤 Donald L Christman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
C; C08; C08F; C08F114/00; C08F114/02; C08F114/04; C08F114/06; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE PROCESS OF PREPARING POLY(VINYL CHLORIDE) WHICH COMPRISES HOMOPOLYMERIZING VINYL CHLORIDE WITH A CATALYST CONSISTING ESSENTIALLY OF THAT FORMED BY MIXING THE COMPONENTS OF ONE OF THE COMBINATIONS SELECTED FROM THE GROUP CONSISTING OF (A) COPPER ACETYLACETONATE WITH AN ALUMINUM TRIALKYL (B) A COPPER CHLORIDE WITH AN ALUMINUM TRIALKYL (C) COPPER ACETYLACETONATE WITH DIETHYLMAGNESIUM (D) A COPPER CHLORIDE WITH AN ALKALI METAL ALKYL (E) SILVER CHLORIDE WITH AN ALKALI METAL ALKYL, SAID COMPONENTS BEING MIXED IN A MOLAR RATIO OF FROM ABOUT 0.1:1 TO ABOUT 20:1.
Claim 2
Dependent Claim
86 words
THE PROCESS OF PREPARING POLY(VINYL CHLORIDE) WHICH COMPRISES HOMOPOLYMERIZING VINYL CHLORIDE WITH A CATALYST CONSISTING ESSENTIALLY OF THAT FORMED BY MIXING THE COMPONENTS OF ONE OF THE COMBINATIONS SELECTED FROM THE GROUP CONSISTING OF (A) COPPER ACETYLACETONATE WITH AN ALUMINUM TRIALKYL (B) A COPPER CHLORIDE WITH AN ALUMINUM TRIALKYL (C) COPPER ACETYLACETONATE WITH DIETHYLMAGNESIUM (D) A COPPER CHLORIDE WITH AN ALKALI METAL ALKYL (E) SILVER CHLORIDE WITH AN ALKALI METAL ALKYL, SAID COMPONENTS BEING MIXED IN A MOLAR RATIO OF FROM ABOUT 0.1:1 TO ABOUT 20:1.
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) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |