US2673716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bit
Assignee: Individual
•
Filing: 1950-09-02
•
Granted: 1954-03-30
•
Expires: 1970-09-02
Abstract
No abstract record available.
Inventors
- 👤 Clyde E Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; E21B10/36; E21B10/44; E21B10/445; E21B17/00; E21B17/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US455963A
Cited
US836845A
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US993972A
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US1136987A
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US1887372A
Cited
US2094495A
Cited
US2216361A
Cited
US2301915A
Cited
US2208985A
Cited
GB549757A
Cited
US2354656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |