US2958204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid oxygen converter
Assignee: Aro Equipment Corp
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Filing: 1956-08-13
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Granted: 1960-11-01
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Expires: 1976-08-13
Abstract
No abstract record available.
Inventors
- 👤 Roy H Spaulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:37
CPC Classifications
F; F17; F17C; F17C9/00; F17C9/02; B; B64; B64D; B64D13/00; B64D13/02; B64D13/04; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2203/00; F17C2203/03; F17C2203/0391; F17C2203/0395; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0629; F17C2221/00; F17C2221/01; F17C2221/011; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2225/00; F17C2225/01; F17C2225/0107; F17C2225/0123; F17C2227/00; F17C2227/03; F17C2227/0302; F17C2250/00; F17C2250/04; F17C2250/0486; F17C2250/0495; F17C2270/00; F17C2270/01; F17C2270/0186; F17C2270/0189; F17C2270/02; F17C2270/025; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y02T50/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |