Patent US2218955A successfully refreshed from Google Patents.
US2218955A
Expired / Lapsed
US
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Guide for flexible well lines
Assignee: Individual
•
Filing: 1939-08-15
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Granted: 1940-10-22
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Expires: 1959-08-15
Abstract
No abstract record available.
Inventors
- 👤 Julius W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:03
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/14; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/068; E21B33/072; E21B36/00; E21B36/04; E21B43/00; E21B43/16; E21B43/24; E21B43/2401
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) | 1943-10-22 | 1944-04-22 | 1944-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-22 | 1948-04-22 | 1948-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-22 | 1952-04-22 | 1952-10-22 | $7700.00 | Window Closed / Lapsed |