US2761832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid treating apparatus
Assignee: CRYSTAL RES LAB Inc
•
Filing: 1950-08-24
•
Granted: 1956-09-04
•
Expires: 1970-08-24
Abstract
No abstract record available.
Inventors
- 👤 Charles G Robb
- 👤 Samuel I Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
B; B01; B01J; B01J47/00; B01J47/012; C; C02; C02F; C02F1/00; C02F1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A WATER TESTING APPARATUS COMPRISING A CONTAINER, A SHELF ON THE INSIDE OF SAID CONTAINER, SAID SHELF HAVING AT LEAST ONE APERTURE, A REMOVABLE CARTRIDGE SUPPORTED IN SAID APERTURE, THE WALLS OF SAID CATRIDGE BEING PLIABLE AND CONFORMABLE WITH THE INNER PERIPHERY OF SAID APERTURE TO FORM A WATER-TIGHT SEAL WITH SAID SHELF, SAID CATRIDGE AND SHELF DIVIDING SAID CONTAINER INTO AN UPPER CHAMBER AND A LOWER RESERVOIR CHAMBER, THE TOP OF SAID CARTRIDGE COMMUNICATING WITH THE UPPER CHAMBER AND THE BOTTOM OF SAID CARTRIDGE COMMUNICATING WITH THE RESERVOIR CHAMBER.
Claim 2
Dependent Claim
90 words
A WATER TESTING APPARATUS COMPRISING A CONTAINER, A SHELF ON THE INSIDE OF SAID CONTAINER, SAID SHELF HAVING AT LEAST ONE APERTURE, A REMOVABLE CARTRIDGE SUPPORTED IN SAID APERTURE, THE WALLS OF SAID CATRIDGE BEING PLIABLE AND CONFORMABLE WITH THE INNER PERIPHERY OF SAID APERTURE TO FORM A WATER-TIGHT SEAL WITH SAID SHELF, SAID CATRIDGE AND SHELF DIVIDING SAID CONTAINER INTO AN UPPER CHAMBER AND A LOWER RESERVOIR CHAMBER, THE TOP OF SAID CARTRIDGE COMMUNICATING WITH THE UPPER CHAMBER AND THE BOTTOM OF SAID CARTRIDGE COMMUNICATING WITH THE RESERVOIR CHAMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |