Patent US3933440A successfully refreshed from Google Patents.
US3933440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical reaction vessel
Assignee: International Telephone and Telegraph Corp
•
Filing: 1974-08-12
•
Granted: 1976-01-20
•
Expires: 1994-08-12
Abstract
Abstract A gas-tight chemical reaction vessel for the chemical analysis of an intractable material such as glass. The reaction vessel comprises a body having at least two concentric chambers, one of which is adapted to contain a reagent, at least one other of which is adapted to receive a sample cap which in turn is adapted to receive a sample. The reaction vessel has a sealing member for sealing the chambers of the body and a cap for securing the sealing member against the body. The body, sealing member and sample cap are made of a material, desirably polytetrafluoroethylene, which is chemically inert to the reagents.
Inventors
- 👤 John Frederick Woolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:21
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; G; G01; G01N; G01N33/00; G01N33/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A gas-tight chemical reaction vessel comprising a body member having a first chamber for reagents and at least one sample chamber, a sample cap within each sample chamber, said cap being adapted to contain a sample of intractable material, a sealing member for sealing the body member, and a cap for securing the sealing member against the body, said sealing member providing a gas-tight relationship with said body while retaining a vapor passageway between said first and said sample chambers, and in which the body, the sealing member and the sample cap are made of a material which is chemically inert to the reagents.
Claim 2
Dependent Claim
104 words
A gas-tight chemical reaction vessel comprising a body member having a first chamber for reagents and at least one sample chamber, a sample cap within each sample chamber, said cap being adapted to contain a sample of intractable material, a sealing member for sealing the body member, and a cap for securing the sealing member against the body, said sealing member providing a gas-tight relationship with said body while retaining a vapor passageway between said first and said sample chambers, and in which the body, the sealing member and the sample cap are made of a material which is chemically inert to the reagents.
Claim 3
Dependent Claim
13 words
The reaction vessel of claim 1 in which the inert materials is polytetrafluoroethylene.
Claim 4
Dependent Claim
26 words
The reaction vessel of claim 1 which further includes an outer container to which the cap is secured to hold the sealing member against the body.
Claim 5
Dependent Claim
17 words
The reaction vessel of claim 1 in which the first chamber is concentric with the sample chamber.
Claim 6
Dependent Claim
32 words
The reaction vessel of claim 4 in which the inner surface of the sealing member is tapered from its center to it periphery so that it slopes downwardly toward the first chamber.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |