US3293773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze drying apparatus
Assignee: Vir Tis Co Inc
•
Filing: 1964-08-24
•
Granted: 1966-12-27
•
Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 Douglas S Frazer
- 👤 Charles E Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:16
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A FREEZE DRYING APPARATUS COMPRISING A CONTAINER HAVING A THREADED CIRCULAR TOP, A COVER THREADEDLY SECURED TO SAID CONTAINER PROVIDED WITH A CIRCULAR VACUUM CONNECTING OPENING THEREWITHIN, A REMOVABLE CIRCULAR MATERIAL IMPERMEABLE FILTER OF AT LEAST EQUAL DIAMETER TO SAID VACUUM CONNECTING OPENING DISPOSED THEREUPON, A VACUUM RELEASE VALVE MEMBER WITHIN SAID COVER AND ABOVE SAID FILTER MEANS, A CAP ABOVE SAID COVER AND THREADEDLY SECURED THERETO PROVIDED WITH A CIRCULAR OPENING IN REGISTRATION WITH SAID OPENING WITHIN SAID COVER, A TUBE MEMBER WITHIN THE OPENINGS WITHIN SAID COVER AND SAID CAP, AND SEALING MEANS INTERVENING SAID TUBE MEMBER AND SAID COVER AND CAP.
Claim 2
Dependent Claim
104 words
A FREEZE DRYING APPARATUS COMPRISING A CONTAINER HAVING A THREADED CIRCULAR TOP, A COVER THREADEDLY SECURED TO SAID CONTAINER PROVIDED WITH A CIRCULAR VACUUM CONNECTING OPENING THEREWITHIN, A REMOVABLE CIRCULAR MATERIAL IMPERMEABLE FILTER OF AT LEAST EQUAL DIAMETER TO SAID VACUUM CONNECTING OPENING DISPOSED THEREUPON, A VACUUM RELEASE VALVE MEMBER WITHIN SAID COVER AND ABOVE SAID FILTER MEANS, A CAP ABOVE SAID COVER AND THREADEDLY SECURED THERETO PROVIDED WITH A CIRCULAR OPENING IN REGISTRATION WITH SAID OPENING WITHIN SAID COVER, A TUBE MEMBER WITHIN THE OPENINGS WITHIN SAID COVER AND SAID CAP, AND SEALING MEANS INTERVENING SAID TUBE MEMBER AND SAID COVER AND CAP.
References Cited (Backward Citations)
US773877A
Cited
US1151417A
Cited
US2307802A
Cited
US2477044A
Cited
US2742709A
Cited
US3009258A
Cited
US3088219A
Cited
US3165386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |