Patent US3100381A successfully refreshed from Google Patents.
US3100381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of producing caissons
Assignee: Case Foundation Co
•
Filing: 1960-03-22
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Granted: 1963-08-13
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Expires: 1980-03-22
Abstract
No abstract record available.
Inventors
- 👤 Stanford E Case
- 👤 James P Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:57
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/22; E02D5/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
THE METHOD OF PRODUCING A CAISSON COMPRISING THE STEPS OF MIXING A COLUMN OF EARTH IN SITU AND IN THE
Claim 2
Independent Claim
20 words
THE METHOD OF PRODUCING A CAISSON COMPRISING THE STEPS OF MIXING A COLUMN OF EARTH IN SITU AND IN THE
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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) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |