Patent US672475A successfully refreshed from Google Patents.
US672475A
Expired / Lapsed
US
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Expansible packing attachment for artesian wells.
Assignee: Individual
•
Filing: 1900-12-19
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Granted: 1901-04-23
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Expires: 1920-12-19
Abstract
No abstract record available.
Inventors
- 👤 Francisco Cavallaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:51
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1243; B; B09; B09C; B09C1/00; B09C1/002; Y; Y10; Y10S; Y10S285/00; Y10S285/91
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) | 1904-04-22 | 1904-10-22 | 1905-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-04-22 | 1908-10-22 | 1909-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-04-22 | 1912-10-22 | 1913-04-23 | $7700.00 | Window Closed / Lapsed |