Patent US2673716A successfully refreshed from Google Patents.
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
2026-11-01 07:51
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US455963A
Cited
US836845A
Cited
US993972A
Cited
US1136987A
Cited
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 |