US2645093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for congelation of ground
Assignee: Individual
•
Filing: 1948-06-21
•
Granted: 1953-07-14
•
Expires: 1968-06-21
Abstract
No abstract record available.
Inventors
- 👤 Daxelhofer Jean Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:07
CPC Classifications
E; E21; E21D; E21D1/00; E21D1/10; E21D1/12; E21D1/14; E02; E02D; E02D3/00; E02D3/11; E02D3/115
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US768774A
Cited
GB190408722A
Cited
US933682A
Cited
US1321230A
Cited
FR512582A
Cited
US1704577A
Cited
GB308310A
Cited
GB516211A
Cited
US2352775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |