US3545916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for inhibiting sulphur deposits in natural gas well risers
Assignee: Gewerkschaft Elwerath
•
Filing: 1967-10-02
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Granted: 1970-12-08
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Expires: 1987-10-02
Abstract
No abstract record available.
Inventors
- 👤 Oskar Deicher
- 👤 Siegfried Peter
- 👤 Otto Buchholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:47
CPC Classifications
C; C23; C23F; C23F15/00; C23F15/005; C01; C01B; C01B17/00; C01B17/02; C01B17/021; C07; C07C; C07C7/00; C07C7/148; C07C7/14875; C09; C09K; C09K8/00; C09K8/52; C09K8/528; C09K8/532; C10; C10K; C10K1/00; C10K1/04; C10K1/043; C09K2208/00; C09K2208/20
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) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |