Patent US1606606A successfully refreshed from Google Patents.
US1606606A
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US
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Apparatus for cementing wells
Assignee: American Iron & Machine Works
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Filing: 1926-06-03
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Granted: 1926-11-09
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Expires: 1946-06-03
Abstract
No abstract record available.
Inventors
- 👤 William T Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:15
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14; E21B33/16
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) | 1929-11-08 | 1930-05-10 | 1930-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-11-08 | 1934-05-10 | 1934-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-11-08 | 1938-05-10 | 1938-11-09 | $7700.00 | Window Closed / Lapsed |