Patent US2573355A successfully refreshed from Google Patents.
US2573355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of gypsum wallboard
Assignee: Certainteed LLC
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Filing: 1950-02-18
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Granted: 1951-10-30
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Expires: 1970-02-18
Abstract
No abstract record available.
Inventors
- 👤 Michael M Powers
- 👤 Clarence J Loechl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:55
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/24; F; F26; F26B; F26B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A DRYING APPARATUS FOR WALLBOARD, AN ELONGATED DRYING KILN, A CONVEYOR MOUNTED IN SAID KILN AND ALONG WHICH WALLBOARD MAY BE MOVED IN A HORIZONTAL POSITION LONGITUDINAL OF SAID KLIN, A PLURALITY OF INDIVIDUAL HEAT RESISTANT FLEXIBLE BLANKET MEMBERS EACH HAVING AN ANCHORING END AND A TRAILING END, ANCHORING MEANS AT SPACED INTERVALS ALONG SAID CONVEYOR AND SPACED UPWARDLY THEREFRON, MEANS SECURING THE ANCHORING ENDS OF SAID BLANKET MEMBERS TO SAID ANCHORING MEANS TO SUSPEND SAID MEMBERS WITHIN SAID KILN AND OVER SAID CONVEYOR IN POSITION TO RIDE ALONG THE UPPER BORDERING SURFACES OF SUCH WALLBOARD AS THE WALLBOARD IS ADVANCED THROUGH SAID KILN BY SAID CONVEYOR SO AS TO THEREBY RETARD DRYING ON THE BORDER PORTIONS OF THE WALLBOARD, AND FLEXIBLE GUIDE ELEMENTS CONNECTED TO THE TRAILING ENDS OF SAID BLANKET MEMBERS AND EXTENDED UPWARDLY PAST ADJACENT SIDE EDGES OF ADJACENT BLANKET MEMBERS TO GUIDE AND INSURE PROPER TRACKING OF SAID BLANKET MEMBERS.
Claim 2
Dependent Claim
155 words
IN A DRYING APPARATUS FOR WALLBOARD, AN ELONGATED DRYING KILN, A CONVEYOR MOUNTED IN SAID KILN AND ALONG WHICH WALLBOARD MAY BE MOVED IN A HORIZONTAL POSITION LONGITUDINAL OF SAID KLIN, A PLURALITY OF INDIVIDUAL HEAT RESISTANT FLEXIBLE BLANKET MEMBERS EACH HAVING AN ANCHORING END AND A TRAILING END, ANCHORING MEANS AT SPACED INTERVALS ALONG SAID CONVEYOR AND SPACED UPWARDLY THEREFRON, MEANS SECURING THE ANCHORING ENDS OF SAID BLANKET MEMBERS TO SAID ANCHORING MEANS TO SUSPEND SAID MEMBERS WITHIN SAID KILN AND OVER SAID CONVEYOR IN POSITION TO RIDE ALONG THE UPPER BORDERING SURFACES OF SUCH WALLBOARD AS THE WALLBOARD IS ADVANCED THROUGH SAID KILN BY SAID CONVEYOR SO AS TO THEREBY RETARD DRYING ON THE BORDER PORTIONS OF THE WALLBOARD, AND FLEXIBLE GUIDE ELEMENTS CONNECTED TO THE TRAILING ENDS OF SAID BLANKET MEMBERS AND EXTENDED UPWARDLY PAST ADJACENT SIDE EDGES OF ADJACENT BLANKET MEMBERS TO GUIDE AND INSURE PROPER TRACKING OF SAID BLANKET MEMBERS.
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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |