Patent US3158958A successfully refreshed from Google Patents.
US3158958A
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Soil treating method
Assignee: Shell USA Inc
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Filing: 1963-12-23
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Granted: 1964-12-01
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Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Lincoln E Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:30
CPC Classifications
A; A01; A01C; A01C23/00; A01C23/02; A01C23/023; A01C23/025; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/4238; Y10T137/4245; Y10T137/4259
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
IN THE INTRODUCTION INTO THE GROUND OF A VOLATILE LIQUID CONTAINING DISSOLVED THEREIN A MATERIAL SUBJECT TO DEPOSITION UPON EVAPORATION OF SAID LIQUID, THE METHOD OF FLUSHING FOR PREVENTING CLOGGING OF THE DISTRIBUTION SYSTEM WHICH COMPRISES: (A) CONFINING SAID LIQUID AND MATERIAL WITHIN A PRESSURETIGHT VESSEL OF SUFFICIENT VOLUME TO CONTAIN SAID LIQUID IN BOTH CONDENSED AND VAPORIZED FORM; (B) INTRODUCING THE CONDENSED FORM OF SAID LIQUID WITH THE MATERIAL DISSOLVED THEREIN FROM SAID VESSEL INTO DISTRIBUTION MEANS LEADING TO THE GROUND; (C) TERMINATING THE INTRODUCTION OF SAID LIQUID WITH THE MATERIAL DISSOLVED THEREIN; AND, (D) INTRODUCING THE VAPORIZED FORM OF THE LIQUID FROM SAID VESSEL INTO THE DISTRIBUTION MEANS AND THEREBY PURGING SAID MATERIAL THEREFROM.
Claim 2
Dependent Claim
116 words
IN THE INTRODUCTION INTO THE GROUND OF A VOLATILE LIQUID CONTAINING DISSOLVED THEREIN A MATERIAL SUBJECT TO DEPOSITION UPON EVAPORATION OF SAID LIQUID, THE METHOD OF FLUSHING FOR PREVENTING CLOGGING OF THE DISTRIBUTION SYSTEM WHICH COMPRISES: (A) CONFINING SAID LIQUID AND MATERIAL WITHIN A PRESSURETIGHT VESSEL OF SUFFICIENT VOLUME TO CONTAIN SAID LIQUID IN BOTH CONDENSED AND VAPORIZED FORM; (B) INTRODUCING THE CONDENSED FORM OF SAID LIQUID WITH THE MATERIAL DISSOLVED THEREIN FROM SAID VESSEL INTO DISTRIBUTION MEANS LEADING TO THE GROUND; (C) TERMINATING THE INTRODUCTION OF SAID LIQUID WITH THE MATERIAL DISSOLVED THEREIN; AND, (D) INTRODUCING THE VAPORIZED FORM OF THE LIQUID FROM SAID VESSEL INTO THE DISTRIBUTION MEANS AND THEREBY PURGING SAID MATERIAL THEREFROM.
Claim 3
Dependent Claim
18 words
A METHOD ACCORDING TO CLAIM 1 WHEREIN THE VOLATILE LIQUID IS ANHYDROUS AMMONIA AND THE MATERIAL IS SULFUR.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |