US3475137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for exothermic catalytic reactions with integral heat exchanger
Assignee: Chemical Construction Corp
•
Filing: 1967-03-09
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Granted: 1969-10-28
•
Expires: 1987-03-09
Abstract
No abstract record available.
Inventors
- 👤 Chi S Kuo
- 👤 Axel Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:26
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/0285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3366460A
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US3409397A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |