US2872068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double bottom compressed gas cylinder and method of making same
Assignee: Pressed Steel Tank Co
•
Filing: 1955-10-12
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Granted: 1959-02-03
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Expires: 1975-10-12
Abstract
No abstract record available.
Inventors
- 👤 Roy R Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:06
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/08; F17C13/084; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/03; F17C2201/032; F17C2205/00; F17C2205/01; F17C2205/0153; F17C2205/018; F17C2209/00; F17C2209/22; F17C2209/221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141846A
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US1558768A
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US2304354A
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FR976965A
Cited
US2329938A
Cited
US2489766A
Cited
US2568512A
Cited
DE822673C
Cited
FR1023659A
Cited
US2660778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |