US2914845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting liners and casings
Assignee: LUCILE WELLS CRITES
•
Filing: 1953-11-19
•
Granted: 1959-12-01
•
Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Virgil C Crites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1009; F16L58/1027; B; B29; B29C; B29C55/00; B29C55/22; B29C55/24; B29C63/00; B29C63/18; B29C63/185; B29C67/00; B29C67/0014; B29C67/0018; E; E21; E21B; E21B17/00; E21B17/10; E21B17/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |