Patent US977442A successfully refreshed from Google Patents.
US977442A
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US
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Composition of matter for and method of generating hydrogen.
Assignee: Roessler and Hasslacher Chemical Co
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Filing: 1910-04-04
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Granted: 1910-12-06
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Expires: 1930-04-04
Abstract
No abstract record available.
Inventors
- 👤 Hans Foersterling
- 👤 Herbert Philipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:03
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/08; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
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) | 1913-12-05 | 1914-06-06 | 1914-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-12-05 | 1918-06-06 | 1918-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-12-05 | 1922-06-06 | 1922-12-06 | $7700.00 | Window Closed / Lapsed |