US2647431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion bolt
Assignee: Ohio Brass Co
•
Filing: 1950-02-15
•
Granted: 1953-08-04
•
Expires: 1970-02-15
Abstract
No abstract record available.
Inventors
- 👤 Warren J Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:55
CPC Classifications
F; F16; F16B; F16B13/00; F16B13/04; F16B13/06; F16B13/063; F16B13/066; E; E21; E21D; E21D21/00; E21D21/008
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US406565A
Cited
US1790841A
Cited
US731931A
Cited
US1025275A
Cited
US1119843A
Cited
US1333880A
Cited
US1623789A
Cited
GB402375A
Cited
US2102230A
Cited
US2198964A
Cited
US2399069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |