Patent US3215503A successfully refreshed from Google Patents.
US3215503A
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US
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Apparatus for generating and storing inert gas
Assignee: HJ Zimmer Verfahrenstechnik
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Filing: 1961-10-09
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Granted: 1965-11-02
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Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Nessler Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:43
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/70; A23B2/704; A23B2/7045; C; C21; C21D; C21D1/00; C21D1/74; C21D1/76; C21D1/763
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1588258A
Cited
US2085584A
Cited
US2051125A
Cited
US2418162A
Cited
US2897158A
Cited
US3000707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |