US2232898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of solidifying porous earth materials
Assignee: Individual
•
Filing: 1937-04-22
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Granted: 1941-02-25
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Expires: 1957-04-22
Abstract
No abstract record available.
Inventors
- 👤 Charles S Ackley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:04
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/12; C; C09; C09K; C09K17/00; C09K17/02; E21; E21D; E21D1/00; E21D1/10; E21D1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-25 | 1944-08-26 | 1945-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-25 | 1948-08-26 | 1949-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-25 | 1952-08-26 | 1953-02-25 | $7700.00 | Window Closed / Lapsed |