US2803115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant holdover package
Assignee: Individual
•
Filing: 1953-07-17
•
Granted: 1957-08-20
•
Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 John C Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:02
CPC Classifications
F; F25; F25D; F25D3/00; F25D2303/00; F25D2303/08; F25D2303/082; F25D2303/0822; F25D2303/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A REFRIGERANT HOLDOVER PACKAGE FOR USE AS A SEMIPERMANENT REFRIGERANT WHICH CAN BE REPEATEDLY FROZEN AND THAWED, CONSISTING ESSENTIALLY OF A GEL CHOSEN FROM THE CLASS CONSISTING OF THE GELS OF STARCH, BENTOMITES, AND CELLULOSE GUM, SAID GEL INCLUDING WATER AS THE MAIN INGREDIENT, SAID GEL BEING ENCASED IN A SEALED WATERPROOF CONTAINER, SAID GEL SERVING TO SEAL PUNCTURES MADE IN SAID CONTAINER.
Claim 2
Dependent Claim
63 words
A REFRIGERANT HOLDOVER PACKAGE FOR USE AS A SEMIPERMANENT REFRIGERANT WHICH CAN BE REPEATEDLY FROZEN AND THAWED, CONSISTING ESSENTIALLY OF A GEL CHOSEN FROM THE CLASS CONSISTING OF THE GELS OF STARCH, BENTOMITES, AND CELLULOSE GUM, SAID GEL INCLUDING WATER AS THE MAIN INGREDIENT, SAID GEL BEING ENCASED IN A SEALED WATERPROOF CONTAINER, SAID GEL SERVING TO SEAL PUNCTURES MADE IN SAID CONTAINER.
References Cited (Backward Citations)
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Cited
US1889882A
Cited
US1988058A
Cited
US2154933A
Cited
US2210946A
Cited
US2490047A
Cited
US2574763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |