Patent US3121331A successfully refreshed from Google Patents.
US3121331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostat
Assignee: Individual
•
Filing: 1960-05-03
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Granted: 1964-02-18
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Expires: 1980-05-03
Abstract
No abstract record available.
Inventors
- 👤 Platen Baitzar Carl Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:58
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/021; G05D23/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A THERMOSTAT INCLUDING A CONTAINER, A CYLINDER LOCATED THEREIN, A PISTON OPERATIVE THROUGH THE CYLINDER, THE CONTAINER BEING FILLED WITH A THERMALLY EXPANDING AND CONTRACTING SUBSTANCE WHICH AT LEAST IN THE AREA OF THE PISTON IS OF A YIELDING NATURE, THE PISTON WHEN EXTENDING THROUGH THE CYLINDER TO A MAXIMUM EXTENT HAVING A SURFACE AREA CONTACTING THE INSIDE SURFACE OF THE PART OF THE CYLINDER THROUGH WHICH IT EXTENDS AND A PART OF ITS CYLINDRICAL SURFACE CONTACTING WITH THE YIELDING SUBSTANCE TOTALING AN AREA LESS THAN SIXTEEN AND PREFERABLY TWO TO FIVE TIMES THE VALUE OF THE PISTON''S CROSS SECTIONAL SURFACE.
Claim 2
Dependent Claim
101 words
A THERMOSTAT INCLUDING A CONTAINER, A CYLINDER LOCATED THEREIN, A PISTON OPERATIVE THROUGH THE CYLINDER, THE CONTAINER BEING FILLED WITH A THERMALLY EXPANDING AND CONTRACTING SUBSTANCE WHICH AT LEAST IN THE AREA OF THE PISTON IS OF A YIELDING NATURE, THE PISTON WHEN EXTENDING THROUGH THE CYLINDER TO A MAXIMUM EXTENT HAVING A SURFACE AREA CONTACTING THE INSIDE SURFACE OF THE PART OF THE CYLINDER THROUGH WHICH IT EXTENDS AND A PART OF ITS CYLINDRICAL SURFACE CONTACTING WITH THE YIELDING SUBSTANCE TOTALING AN AREA LESS THAN SIXTEEN AND PREFERABLY TWO TO FIVE TIMES THE VALUE OF THE PISTON''S CROSS SECTIONAL SURFACE.
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |