Patent US1375548A successfully refreshed from Google Patents.
Patent US2769487A successfully refreshed from Google Patents.
US2769487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow torch
Assignee: Individual
•
Filing: 1953-01-05
•
Granted: 1956-11-06
•
Expires: 1973-01-05
Abstract
No abstract record available.
Inventors
- 👤 Fritz L Schweitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:48
CPC Classifications
F; F23; F23D; F23D99/00; F23D99/002; F23D99/004; F23D2206/00; F23D2206/0031
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US612272A
Cited
US654566A
Cited
US703661A
Cited
US872500A
Cited
CH47709A
Cited
US1288171A
Cited
US1527269A
Cited
FR977493A
Cited
US2414455A
Cited
US2539595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |