US3063814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular furnace
Assignee: Hercules Powder Co
•
Filing: 1959-07-27
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Granted: 1962-11-13
•
Expires: 1979-07-27
Abstract
No abstract record available.
Inventors
- 👤 James H Shapleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:22
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN A TUBULAR REACTION FURNACE HAVING A HEATING CHAMBER, THE WALLS THEREOF HAVING SPACED REFACTORY WALL PORBER, THE WALLS THEREOF HAVING SPACED REFRACTORY WALL PORTIONS OF GREATER THICKNESS THAN THE INTERMEDIATE PORTIONS, AND HAVING REACTION TUBES PASSING THROUGH THE HEATING CHAMBER AND SPACED FROM THE CHAMBER WALLS, AND HAVCHAMBNER AND SPACED FROM THE CHAMBER WALLS, AND HAV-
Claim 2
Dependent Claim
57 words
IN A TUBULAR REACTION FURNACE HAVING A HEATING CHAMBER, THE WALLS THEREOF HAVING SPACED REFACTORY WALL PORBER, THE WALLS THEREOF HAVING SPACED REFRACTORY WALL PORTIONS OF GREATER THICKNESS THAN THE INTERMEDIATE PORTIONS, AND HAVING REACTION TUBES PASSING THROUGH THE HEATING CHAMBER AND SPACED FROM THE CHAMBER WALLS, AND HAVCHAMBNER AND SPACED FROM THE CHAMBER WALLS, AND HAV-
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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) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |