US2437456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for treating wells
Assignee: CALPAT Corp
•
Filing: 1941-05-14
•
Granted: 1948-03-09
•
Expires: 1961-05-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert G Bodine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:15
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/08; B; B08; B08B; B08B3/00; B08B3/04; B08B3/10; B08B3/12; E21B28/00; E21B43/00; E21B43/003
Claims Analysis
Total Claims: 0
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US2163649A
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US2170178A
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US2250775A
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US2257997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |