US3268002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating soils and resulting products
Assignee: Shell USA Inc
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Filing: 1965-11-05
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Granted: 1966-08-23
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Expires: 1985-11-05
Abstract
No abstract record available.
Inventors
- 👤 Rudolph F Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:42
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
A PROCESS FOR TREATING POROUS EARTH FORMATION SURROUNDING A BOREHOLE COMPRISING THE STEPS OF ISOLATING A ZONE OF SAID BOREHOLE ADJACENT TO THE FORMATION TO BE TREATED, PUMPING AN AQUEOUS SOLUTION OF A SALT OF A POLYMERIC POLYHYDROXY POLYCARBOXYLIC ACID HAVING A PLURALITY OF STRUCTURAL UNITS.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |