US2735269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing porous formations
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:44
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
A COMPOSITION, USEFUL FOR SEALING POROUS FORMATIONS, WHICH COMPOSITION CONSISTS ESSENTIALLY OF AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF A WATER-INSOLUBLE ORGANIC ACID, AN ALDEHYDE CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN, AND AN INORGANIC OXIDIZING COMPOUND.
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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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |