US3146077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze drying apparatus
Assignee: Pennwalt Corp
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Filing: 1961-07-20
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Granted: 1964-08-25
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Expires: 1981-07-20
Abstract
No abstract record available.
Inventors
- 👤 Manuel E Fuentevilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:33
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A FREEZE DRYING APPARATUS COMPRISING A HOUSING, SHELVES WITHIN SAID HOUSING, MEANS FOR HEATING SAID SHELVES, MEANS FOR MOUNTING THE SHELVES SO AS TO ACCOMODATE THERMAL EXPANSION OF SAID SHELVES, SAID SHELVES HAVING A BLACK COATING THEREON, MEANS INCLUDING A CONDENSER FOR REMOVING MOISTURE FROM WITHIN SAID HOUSING AND REDUCING THE PRESSURE THEREIN, SAID LAST MENTIONED MEANS INCLUDING A PAIR OF CONDENSERS, MEANS FOR EVACUATING THE INTERIOR OF SAID HOUSING ALTERNATIVELY THROUGH ONE OF SAID CONDENSERS, VALVED CONDUIT MEANS FOR SELECTIVELY CIRCULATING STEAM THROUGH SAID CONDENSERS, SAID VALVED CONDUIT MEANS CONNECTING SAID CONDENSERS TO THE THROAT OF AN EJECTOR, WHEREBY A FLUID MAY BE CIRCULATED THROUGH SAID EJECTOR SO AS TO REMOVE MOISTURE FROM THE CONDENSERS WITH THE LATENT SHEET OF EVAPORTION PRE-COOLING SAID CONDENSERS.
Claim 2
Dependent Claim
125 words
A FREEZE DRYING APPARATUS COMPRISING A HOUSING, SHELVES WITHIN SAID HOUSING, MEANS FOR HEATING SAID SHELVES, MEANS FOR MOUNTING THE SHELVES SO AS TO ACCOMODATE THERMAL EXPANSION OF SAID SHELVES, SAID SHELVES HAVING A BLACK COATING THEREON, MEANS INCLUDING A CONDENSER FOR REMOVING MOISTURE FROM WITHIN SAID HOUSING AND REDUCING THE PRESSURE THEREIN, SAID LAST MENTIONED MEANS INCLUDING A PAIR OF CONDENSERS, MEANS FOR EVACUATING THE INTERIOR OF SAID HOUSING ALTERNATIVELY THROUGH ONE OF SAID CONDENSERS, VALVED CONDUIT MEANS FOR SELECTIVELY CIRCULATING STEAM THROUGH SAID CONDENSERS, SAID VALVED CONDUIT MEANS CONNECTING SAID CONDENSERS TO THE THROAT OF AN EJECTOR, WHEREBY A FLUID MAY BE CIRCULATED THROUGH SAID EJECTOR SO AS TO REMOVE MOISTURE FROM THE CONDENSERS WITH THE LATENT SHEET OF EVAPORTION PRE-COOLING SAID CONDENSERS.
References Cited (Backward Citations)
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |