US1301285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible well-casing.
Assignee: FRANK W A FINLEY
•
Filing: 1916-09-01
•
Granted: 1919-04-22
•
Expires: 1936-09-01
Abstract
No abstract record available.
Inventors
- 👤 Roy E Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/10; E21B43/103; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49904; Y10T29/49906; Y10T29/49908; Y10T29/49938; Y10T29/4994
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) | 1922-04-21 | 1922-10-21 | 1923-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-04-21 | 1926-10-21 | 1927-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-04-21 | 1930-10-21 | 1931-04-22 | $7700.00 | Window Closed / Lapsed |