US3372988A
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Process and apparatus for performing reactions in the gaseous phase
Assignee: Topsoe AS
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Filing: 1964-09-18
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Granted: 1968-03-12
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Expires: 1984-09-18
Abstract
No abstract record available.
Inventors
- 👤 Hansen Hans Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:36
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0417; C01C1/0423; B; B01; B01J; B01J8/00; B01J8/0005; B01J8/02; B01J8/04; B01J8/0403; C07; C07C; C07C29/00; C07C29/15; C07C29/151; C07C29/152; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |