US3314482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve control mechanisms and techniques
Assignee: Factory Mutual Research Corp
•
Filing: 1964-04-09
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Granted: 1967-04-18
•
Expires: 1984-04-09
Abstract
No abstract record available.
Inventors
- 👤 John R Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/36; F16K17/38; A; A62; A62C; A62C37/00; A62C37/08; A62C37/10; A62C37/11; A62C37/12; F16K17/386
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD OF INCREASING THE TEMPERATURE AT WHICH AN AUTOMATIC SPRINKLER WILL OPEN, SAID AUTOMATIC SPRINKLER BEING OF THE TYPE COMPRISING A VALVE AND FIRST THERMALLY RESPONSIVE MEANS FOR MAINTAINING SAID VALVE IN CLOSED POSITION BELOW A FIRST PREDETERMINED TEMPERATURE AND FOR OPENING SAID VALVE AT SAID FIRST PREDETERMINED TEMPERATURE, SAID METHOD COMPRISING SUPPLEMENTING SAID FIRST THERMALLY RESPONSIVE MEANS WITH A SECOND THERMALLY RESPONSIVE MEANS WHICH IS RESPONSIVE TO A SECOND PREDETERMINED TEMPERATURE GREATER THAN SAID FIRST PREDETERMINED TEMPERATURE AND WHICH WILL MAINTAIN SAID VALVE IN CLOSED POSITION AT AND ABOVE SAID FIRST PREDETERMINED TEMPERATURE AND UNTIL SAID SECOND PREDETERMINED TEMPERATURE IS REACHED.
Claim 2
Independent Claim
103 words
A METHOD OF INCREASING THE TEMPERATURE AT WHICH AN AUTOMATIC SPRINKLER WILL OPEN, SAID AUTOMATIC SPRINKLER BEING OF THE TYPE COMPRISING A VALVE AND FIRST THERMALLY RESPONSIVE MEANS FOR MAINTAINING SAID VALVE IN CLOSED POSITION BELOW A FIRST PREDETERMINED TEMPERATURE AND FOR OPENING SAID VALVE AT SAID FIRST PREDETERMINED TEMPERATURE, SAID METHOD COMPRISING SUPPLEMENTING SAID FIRST THERMALLY RESPONSIVE MEANS WITH A SECOND THERMALLY RESPONSIVE MEANS WHICH IS RESPONSIVE TO A SECOND PREDETERMINED TEMPERATURE GREATER THAN SAID FIRST PREDETERMINED TEMPERATURE AND WHICH WILL MAINTAIN SAID VALVE IN CLOSED POSITION AT AND ABOVE SAID FIRST PREDETERMINED TEMPERATURE AND UNTIL SAID SECOND PREDETERMINED TEMPERATURE IS REACHED.
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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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |