US3515514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen containing gases
Assignee: Individual
•
Filing: 1967-05-25
•
Granted: 1970-06-02
•
Expires: 1987-05-25
Abstract
No abstract record available.
Inventors
- 👤 Peter Desmond Holmes
- 👤 Alan Richard Thornhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/22; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/80; B01J23/84; B01J23/85; B01J23/86; B01J23/868; C01B3/32; C01B3/34; C01B3/38; C01B3/40; C01B2203/00; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; C01B2203/1076; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y02P20/584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1915362A
Cited
US2010427A
Cited
US2425625A
Cited
US3179500A
Cited
US3197284A
Cited
US3338681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |