Patent US3519397A successfully refreshed from Google Patents.
US3519397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace for obtaining sulphur dioxide
Assignee: Individual
•
Filing: 1967-06-27
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Granted: 1970-07-07
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Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Leonid Alexandrovich Bogdanov
- 👤 Efim Isaakovich Dorman
- 👤 Bentsion Davydovich Katsnelson
- 👤 Mikhail Porfirievich Kavokin
- 👤 Jury Vasilievich Lastochkin
- 👤 Fedor Konstantinovic Mikhailov
- 👤 Leonid Matveevich Person
- 👤 Gennady Markovich Saksonov
- 👤 Viktor Arsenievich Slepnev
- 👤 Boris Romanovich Bogdanov
- 👤 Vladimir Nikolaevic Khvastunov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:20
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/54
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) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |