Patent US4398626A successfully refreshed from Google Patents.
Patent US3749245A successfully refreshed from Google Patents.
US3749245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laboratory digestion tank
Assignee: Bethlehem Steel Corp
•
Filing: 1971-04-23
•
Granted: 1973-07-31
•
Expires: 1991-04-23
Abstract
Abstract Method and apparatus for obtaining samples under carefully controlled conditions of the products of digestion of materials in the anaerobic decomposition of said materials.
Inventors
- 👤 B Kerecz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:07
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/497; G01N33/18; G01N33/186; G01N33/1866; G01N33/4977; Y; Y10; Y10S; Y10S435/00; Y10S435/801; Y10T; Y10T436/00; Y10T436/25; Y10T436/25125
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
Apparatus for obtaining samples of products of digestion of material, comprising: a. an airtight digestion chamber for the anaerobic bacterial digestion of said material, b. an inlet proximate the upper end of said digestion chamber provided with means to prevent contamination of said material by air when material is being introduced into said digestion chamber and having an invert spaced from the bottom of said chamber, c. an outlet proximate the upper end of said digestion chamber provided with means to prevent contamination of said material by air when material is being withdrawn from said digestion chamber and having an invert positioned below the invert of said inlet, d. baffle means mounted in said chamber for each of said inlet and said outlet and spaced therefrom, e. gas collecting means communicating with the upper end of said chamber, f. gas sampling means mounted in said gas collecting means, and g. effluent sampling means adjacent said outlet.
Claim 2
Dependent Claim
156 words
Apparatus for obtaining samples of products of digestion of material, comprising: a. an airtight digestion chamber for the anaerobic bacterial digestion of said material, b. an inlet proximate the upper end of said digestion chamber provided with means to prevent contamination of said material by air when material is being introduced into said digestion chamber and having an invert spaced from the bottom of said chamber, c. an outlet proximate the upper end of said digestion chamber provided with means to prevent contamination of said material by air when material is being withdrawn from said digestion chamber and having an invert positioned below the invert of said inlet, d. baffle means mounted in said chamber for each of said inlet and said outlet and spaced therefrom, e. gas collecting means communicating with the upper end of said chamber, f. gas sampling means mounted in said gas collecting means, and g. effluent sampling means adjacent said outlet.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1 further including: h. means to control the temperature within said chamber.
Claim 4
Dependent Claim
11 words
Apparatus according to claim 2 further including: i. sludge sampling means.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 3 including: j. means to provide an inert atmosphere in said digestion chamber.
Claim 6
Dependent Claim
23 words
Apparatus according to claim 2 further including: i. sludge sampling means, and j. means to provide an inert atmosphere in said digestion chamber.
Claim 7
Dependent Claim
236 words
Apparatus for obtaining samples of products of digestion of material, comprising: a. a storage vessel for said material, b. means to provide an inert atmosphere in said storage vessel, c. means to control the temperature within said storage vessel, d. a digestion chamber for the anaerobic bacterial digestion of said material, e. an inlet proximate the upper end of said digestion chamber having an invert spaced from the bottom of said chamber, f. an outlet proximate the upper end of said digestion chamber having an invert positioned below the invert of said inlet, g. baffle means mounted in said chamber for each of said inlet and said outlet and spaced therefrom, h. gas collecting means communicating with the upper end of said chamber, i. gas sampling means mounted in said gas collecting means, j. an effluent container adjacent said outlet, k. an outlet proximate the bottom of said digestion chamber for sampling sludge, l. means to provide an inert atmosphere in said digestion chamber, m. means to provide an inert atmosphere in said effluent container, n. means to control the temperature within said digestion chamber, o. means to control the temperature of said effluent container, p. pump means tO supply a continuous flow of said material from said storage vessel to said digestion chamber, and q. water seal means between said storage vessel and said digestion chamber, and between said digestion chamber and said effluent container.
Claim 8
Dependent Claim
236 words
Apparatus for obtaining samples of products of digestion of material, comprising: a. a storage vessel for said material, b. means to provide an inert atmosphere in said storage vessel, c. means to control the temperature within said storage vessel, d. a digestion chamber for the anaerobic bacterial digestion of said material, e. an inlet proximate the upper end of said digestion chamber having an invert spaced from the bottom of said chamber, f. an outlet proximate the upper end of said digestion chamber having an invert positioned below the invert of said inlet, g. baffle means mounted in said chamber for each of said inlet and said outlet and spaced therefrom, h. gas collecting means communicating with the upper end of said chamber, i. gas sampling means mounted in said gas collecting means, j. an effluent container adjacent said outlet, k. an outlet proximate the bottom of said digestion chamber for sampling sludge, l. means to provide an inert atmosphere in said digestion chamber, m. means to provide an inert atmosphere in said effluent container, n. means to control the temperature within said digestion chamber, o. means to control the temperature of said effluent container, p. pump means tO supply a continuous flow of said material from said storage vessel to said digestion chamber, and q. water seal means between said storage vessel and said digestion chamber, and between said digestion chamber and said effluent container.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |