US2843053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas anchor
Assignee: Individual
•
Filing: 1956-03-26
•
Granted: 1958-07-15
•
Expires: 1976-03-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Carle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:54
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US194704A
Cited
US1639734A
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US1751017A
Cited
US2214064A
Cited
US2517198A
Cited
US2652130A
Cited
US2764102A
Cited
US2748719A
Cited
US2771038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |