US3129589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive instrument
Assignee: Ametek Inc
•
Filing: 1960-04-01
•
Granted: 1964-04-21
•
Expires: 1980-04-01
Abstract
No abstract record available.
Inventors
- 👤 Tatum David
- 👤 Martin S Maltenfort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:02
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/06; F42C15/00; F42C15/36; F42C5/00; F42C5/02; G; G01; G01L; G01L19/00; G01L19/04; G01L9/00; G01L9/0001; G01L9/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
APPARATUS COMPRISING IN COMBINATION, A CHAMBER; AN ORIFICE LEADING TO SAID CHAMBER; A HEATING SHELL SURROUNDING SAID CHAMBER AND ADAPTED TO SUPPLY HEAT TO SAID CHAMBER; INSULATION SURROUNDING SAID SHELL; TEMPERATURE SENSITIVE MEANS WITHIN SAID CHAMBER; A HEAT BALANCING CIRCUIT CONTROLLED BY SAID TEMPERATURE SENSITIVE MEANS FOR SUPPLYING POWER TO SAID HEATING SHELL TO MAINTAIN SAID CHAMBER AT SUBSTANTIALLY A CONSTANT TEMPERATURE; A MASS INCLUDING AN ELASTOMERIC BODY COMPRISING A POLYMER AND A FLUID WITHIN SAID CHAMBER; AND CONTACTS ADAPTED TO BE ACTUATED BY THE VARIATION IN VOLUME OF SAID ELASTOMERIC BODY DUE TO THE AMBIENT PRESSURE REACHING THE BOILING PRESSURE OF SAID FLUID.
Claim 2
Dependent Claim
104 words
APPARATUS COMPRISING IN COMBINATION, A CHAMBER; AN ORIFICE LEADING TO SAID CHAMBER; A HEATING SHELL SURROUNDING SAID CHAMBER AND ADAPTED TO SUPPLY HEAT TO SAID CHAMBER; INSULATION SURROUNDING SAID SHELL; TEMPERATURE SENSITIVE MEANS WITHIN SAID CHAMBER; A HEAT BALANCING CIRCUIT CONTROLLED BY SAID TEMPERATURE SENSITIVE MEANS FOR SUPPLYING POWER TO SAID HEATING SHELL TO MAINTAIN SAID CHAMBER AT SUBSTANTIALLY A CONSTANT TEMPERATURE; A MASS INCLUDING AN ELASTOMERIC BODY COMPRISING A POLYMER AND A FLUID WITHIN SAID CHAMBER; AND CONTACTS ADAPTED TO BE ACTUATED BY THE VARIATION IN VOLUME OF SAID ELASTOMERIC BODY DUE TO THE AMBIENT PRESSURE REACHING THE BOILING PRESSURE OF SAID FLUID.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |