Patent US353740A successfully refreshed from Google Patents.
US1050902A
Expired / Lapsed
US
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Economic method of obtaining gases.
Assignee: NITROGEN Co
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Filing: 1911-05-16
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Granted: 1913-01-21
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Expires: 1931-05-16
Abstract
No abstract record available.
Inventors
- 👤 Charles E Acker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:06
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1916-01-21 | 1916-07-22 | 1917-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1920-01-21 | 1920-07-22 | 1921-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1924-01-21 | 1924-07-22 | 1925-01-21 | $7700.00 | Window Closed / Lapsed |