US2841308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessel closure
Assignee: American Machine and Metals Inc
•
Filing: 1954-12-23
•
Granted: 1958-07-01
•
Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 Frederic C Weicker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:07
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/03; F; F16; F16J; F16J13/00; F16J13/02; F16J13/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR327893A
Cited
US1002029A
Cited
US1858013A
Cited
US2160062A
Cited
US2583073A
Cited
US2670099A
Cited
US2718239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |