Patent US2197587A successfully refreshed from Google Patents.
Patent US1423713A successfully refreshed from Google Patents.
US1423713A
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Assignee: Individual
•
Filing: 1920-06-05
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Granted: 1922-07-25
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Expires: 1940-06-05
Abstract
No abstract record available.
Inventors
- 👤 Roches Hilton Henry Des
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:13
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/36; E21B10/38; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17923
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) | 1925-07-24 | 1926-01-23 | 1926-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-24 | 1930-01-23 | 1930-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-24 | 1934-01-23 | 1934-07-25 | $7700.00 | Window Closed / Lapsed |