US2826467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure cylinder
Assignee: ELCO Manufacturing Co
•
Filing: 1956-05-21
•
Granted: 1958-03-11
•
Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 Herman E Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:10
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02; Y; Y10; Y10T; Y10T292/00; Y10T292/20; Y10T292/205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2340817A
Cited
US2690939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |