US3264746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freeze-drying
Assignee: Edwards High Vacuum International Ltd
•
Filing: 1964-04-23
•
Granted: 1966-08-09
•
Expires: 1984-04-23
Abstract
No abstract record available.
Inventors
- 👤 Pearse Anthony Guy Everson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:05
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/04; F26B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A METHOD OF FREEZE-DRYING A SMALL SAMPLE OF TISSUE OF SMALL HEAT CAPACITY USING A THERMO-ELECTRIC MODULE DISPOSED WITHIN AN EVACUABLE CHAMBER AND OPERABLE BY THE PELTIER EFFECT TO PRODUCE HEAT EXCHANGE BETWEEN THE MODULE AND A TISSUE SUPPORTING SURFACE WITHIN THE CHAMBER, THE METHOD INCLUDING THE STEPS OF FREEZING THE SAMPLE, INTRODUCING THE SAMPLE TO THE EVACUABLE CHAMBER TOGETHER WITH A WAX CONTAINED IN A CUP MEMBER WHICH IS PLACED ON THE SUPPORTING SURFACE, SEALING THE CHAMBER, REDUCING THE PRESSURE IN THE CHAMBER BY A VACUUM PUMP, CONTROLLING THE TEMPERATURE OF THE SAMPLE BY THE THERMO-ELECTRIC
Claim 2
Independent Claim
97 words
A METHOD OF FREEZE-DRYING A SMALL SAMPLE OF TISSUE OF SMALL HEAT CAPACITY USING A THERMO-ELECTRIC MODULE DISPOSED WITHIN AN EVACUABLE CHAMBER AND OPERABLE BY THE PELTIER EFFECT TO PRODUCE HEAT EXCHANGE BETWEEN THE MODULE AND A TISSUE SUPPORTING SURFACE WITHIN THE CHAMBER, THE METHOD INCLUDING THE STEPS OF FREEZING THE SAMPLE, INTRODUCING THE SAMPLE TO THE EVACUABLE CHAMBER TOGETHER WITH A WAX CONTAINED IN A CUP MEMBER WHICH IS PLACED ON THE SUPPORTING SURFACE, SEALING THE CHAMBER, REDUCING THE PRESSURE IN THE CHAMBER BY A VACUUM PUMP, CONTROLLING THE TEMPERATURE OF THE SAMPLE BY THE THERMO-ELECTRIC
References Cited (Backward Citations)
US2307802A
Cited
US2494541A
Cited
US2803888A
Cited
US3009258A
Cited
US3096163A
Cited
US3169049A
Cited
US3192643A
Cited
US3151465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |