US3997296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary standards
Assignee: Spex Industries Inc
•
Filing: 1975-02-06
•
Granted: 1976-12-14
•
Expires: 1995-02-06
Abstract
Abstract Apparatus is supplied for providing a primary standard of a gas by sealing in a container a material which is the source of the gas in predetermined amounts. Upon releasing the gas from the material, sample aliquots are removed and are passed into the analytical equipment being used in the subject testing.
Inventors
- 👤 Warren V. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:25
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0006; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/100833
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
A method for the provision of a primary standard which method comprises: placing into a container of known volume a known amount of a material from which a gas may be released in a known amount by heating; sealing said container; effecting the dissociation of said gas from said material in said container by heating said material to its dissociation temperature; and withdrawing from said container a known amount of said gas for use in calibrating a detector.
Claim 2
Independent Claim
78 words
A method for the provision of a primary standard which method comprises: placing into a container of known volume a known amount of a material from which a gas may be released in a known amount by heating; sealing said container; effecting the dissociation of said gas from said material in said container by heating said material to its dissociation temperature; and withdrawing from said container a known amount of said gas for use in calibrating a detector.
Claim 3
Dependent Claim
19 words
A method in accordance with claim 1 in which said material releases a mixture of gases upon said heating.
Claim 4
Dependent Claim
27 words
A method in accordance with claim 1 in which said gas is released at a temperature no higher than about 200° C. and is an inorganic gas.
Claim 5
Dependent Claim
27 words
A method in accordance with claim 1 in which said gas is released at a temperature no higher than about 200° C. and is an organic gas.
Claim 6
Dependent Claim
15 words
A method in accordance with claim 1 in which said container has a known volume.
Claim 7
Dependent Claim
29 words
A method in accordance with claim 1 in which said container has in it more than one kind of the said material, thereby to produce a mixture of gases.
Claim 8
Dependent Claim
16 words
A method in accordance with claim 1 in which said sealing is effected using a septum.
Claim 9
Dependent Claim
23 words
A method in accordance with claim 7 in which an aliquot of said gas is withdrawn through said septum using a gas-tight syringe.
Claim 10
Dependent Claim
19 words
A method in accordance with claim 1 in which said material is a combination of a clathrate and gas.
Claim 11
Dependent Claim
15 words
A method in accordance with claim 9 in which said clathrate is an inorganic clathrate.
Claim 12
Dependent Claim
15 words
A method in accordance with claim 9 in which said clathrate is an organic clathrate.
Claim 13
Dependent Claim
22 words
A method in accordance with claim 1 in which said material is a combination of a transition metal complex and a gas.
Claim 14
Dependent Claim
15 words
A method in accordance with claim 12 in which said complex is an iridium compound.
Claim 15
Dependent Claim
20 words
A method in accordance with claim 13 in which said iridium compound is a gas adduct of chlorocarbonylbis (triphenylphosphine) iridium(1).
Claim 16
Dependent Claim
20 words
A method in accordance with claim 13 in which said iridium compound is a gas adduct of bis(1,2-diphenylphosphinoethane) iridium(1) chloride.
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) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |