US1808913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holding ring for manufacturing well screens
Assignee: HOWARD F SMITH
•
Filing: 1929-11-25
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Granted: 1931-06-09
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Expires: 1949-11-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Hillsman D Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:22
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; B; B25; B25B; B25B5/00; B25B5/14; B25B5/147; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49602; Y10T29/53; Y10T29/53657; Y10T29/53909; Y10T29/53913
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) | 1934-06-08 | 1934-12-08 | 1935-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-06-08 | 1938-12-08 | 1939-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-06-08 | 1942-12-08 | 1943-06-09 | $7700.00 | Window Closed / Lapsed |