US2768949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for treating clogged underground sewage drain systems
Assignee: Individual
•
Filing: 1953-08-17
•
Granted: 1956-10-30
•
Expires: 1973-08-17
Abstract
No abstract record available.
Inventors
- 👤 George R Hewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:58
CPC Classifications
E; E03; E03F; E03F1/00; E03F1/002; E03F7/00; E03F7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE METHOD OF TREATING AN UNDERGROUND DRAIN SYSTEM INCLUDING A WATER CONTAINING CHAMBER AND A POROUS FORMATION INITIALLY COMMUNICATING THEREWITH TO REMOVE DENSE CLOGGING MATERIAL FROM THE WALLS OF THE CHAMBER AND WITHIN THE FORMATION; SAID METHOD INCLUDING DISINTEGRATING AND DECOMPOSING SAID CLOGGING MATERIAL IN THE CHAMBER TO A CONDITION CAPABLE PASSAGE THROUGH THE INTERSTICES OF SAID POROUS FORMATION, DISINTEGRATING AND DECOMPOSING THE CLOGGING MATERIAL IN SAID FORMATION BY PENETRATING AND INJECTING WITHIN THE FORMATION A PRESSURIZED ACIDIC FLUID STREAM TO OPEN A DRAINAGE PATH THERETHROUGH, AND DRAINING THE CONTENTS OF SAID CHAMBER INCLUDING SAID CLOGGING MATERIAL THROUGH THE POROUS FORMATION AND INTO THE OUTLYING FORMATION.
Claim 2
Independent Claim
106 words
THE METHOD OF TREATING AN UNDERGROUND DRAIN SYSTEM INCLUDING A WATER CONTAINING CHAMBER AND A POROUS FORMATION INITIALLY COMMUNICATING THEREWITH TO REMOVE DENSE CLOGGING MATERIAL FROM THE WALLS OF THE CHAMBER AND WITHIN THE FORMATION; SAID METHOD INCLUDING DISINTEGRATING AND DECOMPOSING SAID CLOGGING MATERIAL IN THE CHAMBER TO A CONDITION CAPABLE PASSAGE THROUGH THE INTERSTICES OF SAID POROUS FORMATION, DISINTEGRATING AND DECOMPOSING THE CLOGGING MATERIAL IN SAID FORMATION BY PENETRATING AND INJECTING WITHIN THE FORMATION A PRESSURIZED ACIDIC FLUID STREAM TO OPEN A DRAINAGE PATH THERETHROUGH, AND DRAINING THE CONTENTS OF SAID CHAMBER INCLUDING SAID CLOGGING MATERIAL THROUGH THE POROUS FORMATION AND INTO THE OUTLYING FORMATION.
References Cited (Backward Citations)
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Cited
US1892093A
Cited
US2010540A
Cited
US2352832A
Cited
US2419076A
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US2648440A
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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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |