US3166305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas fired vacuum furnace
Assignee: Sunbeam Corp
•
Filing: 1961-06-23
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Granted: 1965-01-19
•
Expires: 1981-06-23
Abstract
No abstract record available.
Inventors
- 👤 Vincent R Troglione
- 👤 Smith Jonathan
- 👤 Roth Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:12
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/773
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A VACUUM FURNACE COMPRISING A PRESSURE-TIGHT CYLINDRICAL RETORT SUPPORTED WITH THE AXIS THEREOF EXTENDING VERTICALLY AND HAVING A CLOSED UPPER END AND AN OPEN LOWER END, A CLOSURE PLATE FOR SAID RETORT CARRIED BY AN ELEVATOR VERTICALLY MOVABLE BETWEEN AN UPPER POSITION IN SEALING ENGAGEMENT WITH SAID OPEN LOWER END AND A LOWERED POSITION, A PLURALITY OF VERTICALLY SPACED, HORIZONTALLY DISPOSED RADIATION SHIELDS MOUNTED ON THE UPPER SURFACE OF SAID CLOSURE PLATE, AND A WORK SUPPORTING MEANS CARRIED BY SAID CLOSURE PLATE AND POSITIONED ABOVE SAID RADIATION SHIELDS, SAID WORK SUPPORTING MEANS BEING SPACED BELOW SAID RETORT WHEN SAID ELEVATOR IS IN SAID LOWERED POSITION.
Claim 2
Dependent Claim
105 words
A VACUUM FURNACE COMPRISING A PRESSURE-TIGHT CYLINDRICAL RETORT SUPPORTED WITH THE AXIS THEREOF EXTENDING VERTICALLY AND HAVING A CLOSED UPPER END AND AN OPEN LOWER END, A CLOSURE PLATE FOR SAID RETORT CARRIED BY AN ELEVATOR VERTICALLY MOVABLE BETWEEN AN UPPER POSITION IN SEALING ENGAGEMENT WITH SAID OPEN LOWER END AND A LOWERED POSITION, A PLURALITY OF VERTICALLY SPACED, HORIZONTALLY DISPOSED RADIATION SHIELDS MOUNTED ON THE UPPER SURFACE OF SAID CLOSURE PLATE, AND A WORK SUPPORTING MEANS CARRIED BY SAID CLOSURE PLATE AND POSITIONED ABOVE SAID RADIATION SHIELDS, SAID WORK SUPPORTING MEANS BEING SPACED BELOW SAID RETORT WHEN SAID ELEVATOR IS IN SAID LOWERED POSITION.
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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) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |