US3188593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector assembly
Assignee: Individual
•
Filing: 1962-10-10
•
Granted: 1965-06-08
•
Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Vasel
- 👤 Rudolph W Kalns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:18
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/12; H; H01; H01H; H01H37/00; H01H37/02; H01H37/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
A FIRE DETECTOR ASSEMBLY OF THE TYPE DESCRIBED, COMPRISING A PHOTO-RESISTIVE CELL, SAID CELL COMPRISING TWO PORTIONS FORMED OF THE SAME TYPE OF PHOTO-RESISTIVE MATERIAL, SAID PORTIONS HAVING A COMMON JUNCTION AT ONE ELETRICIAL END AND MEANS FOR MAKING AN ELECTRICAL CONNECTION TO SAID JUNCTION AND TO THE OPPOSITE ELECTRICAL ENDS OF SAID PORTIONS, AND A DIFFERENT LIGHT FILTER DISPOSED OVER EACH OF SAID PORTIONS, THE FILTER OVER ONE PORTION TRANSMITTING PRINCIPALLY LIGHT ABOVE A PREDETERMINED FREQUENCY, THE FILTER OVER THE OTHER PORTION TRANSMITTING PRINCIPALLY LIGHT BELOW SAID PREDETERMINED FREQUENCY, SAID CELL PORTIONS AND THEIR ASSOCIATED FILTERS BEING DISPOSED CLOSELY ADJACENT EACH OTHER, WHEREBY SUBSTANTIALLY THE SAME AMOUNT AND TYPE OF RADIATION IMPINGES ON EACH FILTER.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |