US2521669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torch beveling apparatus
Assignee: Linde Air Products Co
•
Filing: 1945-08-30
•
Granted: 1950-09-05
•
Expires: 1965-08-30
Abstract
No abstract record available.
Inventors
- 👤 John H Rountree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:07
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR675273A
Cited
US1590651A
Cited
US1857505A
Cited
US1787247A
Cited
US2152213A
Cited
US2059236A
Cited
US2202130A
Cited
US2146266A
Cited
US2206969A
Cited
US2293853A
Cited
US2253540A
Cited
US2269505A
Cited
US2283347A
Cited
US2317495A
Cited
US2373541A
Cited
US2363036A
Cited
US2363828A
Cited
US2306945A
Cited
US2412281A
Cited
US2443710A
Cited
US2403514A
Cited
US2358772A
Cited
US2381308A
Cited
US2429686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |