US3228020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room status indicating system
Assignee: Individual
•
Filing: 1963-09-19
•
Granted: 1966-01-04
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Gassenheimer Irvin
- 👤 Jr Irvin Gassenheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:24
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G08B5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A HOTEL SIGNALLING SYSTEM COMPRISING A CENTRAL PANEL, A REMOTE PANEL, A PLURALITY OF RROM UNITS, A SOURCE OF A.C. CURRENT, A SOURCE OF D.C. CURRENT, EACH OF SAID PANELS CONTAINING A PLURALITY OF PAIRS OF LAMPS AND EACH ROOM UNIT CONTAINING A ROOM LAMP, EACH OF SAID LAMP PAIRS IN ONE PANEL HAVING A CORRESPONDING LAMP PAIR IN THE OTHER PANEL AND A CORRESPONDING ROOM LAMP TO FORM A PLURALITY OF INDIVIDUAL SIGNALLING CIRCUITS, AND EACH OF SAID SIGNALLING CIRCUITS FURTHER INCLUDING SELECTOR SWITCH MEANS HAVING AT LEAST THREE POSITIONS AND AN OUTPUT AND CONNECTED TO THE SOURCE OF A.C. CURRENT AND THE SOURCE OF D.C. CURRENT FOR SELECTIVELY CONNECTING SAID A.C. SOURCE OF ENERGIZATION OR SAID D.C. SOURCE OF ENERGIZATION TO SAID OUTPUT OR MAINTAINING AN OPEN CIRCUIT CONDITION BETWEEN SAID SOURCES AND SAID OUTPUT, A FIRST LAMP OF EACH OF SAID CORRESPONDING LAMP PAIRS ASSOCIATED WITH THE ONE SIGNALLING CIRCUIT CONNECTED TO A FIRST LAMP ENERGIZING CIRCUIT, A SECOND LAMP OF EACH OF SAID SAME CORRESPONDING LAMP PAIRS ASSOCIATED WITH THE SAME ONE SIGNALLING CIRCUIT CONNECTED TO A SECOND LAMP ENERGIZING CIRCUIT, FIRST SWITCH
Claim 2
Dependent Claim
187 words
A HOTEL SIGNALLING SYSTEM COMPRISING A CENTRAL PANEL, A REMOTE PANEL, A PLURALITY OF RROM UNITS, A SOURCE OF A.C. CURRENT, A SOURCE OF D.C. CURRENT, EACH OF SAID PANELS CONTAINING A PLURALITY OF PAIRS OF LAMPS AND EACH ROOM UNIT CONTAINING A ROOM LAMP, EACH OF SAID LAMP PAIRS IN ONE PANEL HAVING A CORRESPONDING LAMP PAIR IN THE OTHER PANEL AND A CORRESPONDING ROOM LAMP TO FORM A PLURALITY OF INDIVIDUAL SIGNALLING CIRCUITS, AND EACH OF SAID SIGNALLING CIRCUITS FURTHER INCLUDING SELECTOR SWITCH MEANS HAVING AT LEAST THREE POSITIONS AND AN OUTPUT AND CONNECTED TO THE SOURCE OF A.C. CURRENT AND THE SOURCE OF D.C. CURRENT FOR SELECTIVELY CONNECTING SAID A.C. SOURCE OF ENERGIZATION OR SAID D.C. SOURCE OF ENERGIZATION TO SAID OUTPUT OR MAINTAINING AN OPEN CIRCUIT CONDITION BETWEEN SAID SOURCES AND SAID OUTPUT, A FIRST LAMP OF EACH OF SAID CORRESPONDING LAMP PAIRS ASSOCIATED WITH THE ONE SIGNALLING CIRCUIT CONNECTED TO A FIRST LAMP ENERGIZING CIRCUIT, A SECOND LAMP OF EACH OF SAID SAME CORRESPONDING LAMP PAIRS ASSOCIATED WITH THE SAME ONE SIGNALLING CIRCUIT CONNECTED TO A SECOND LAMP ENERGIZING CIRCUIT, FIRST SWITCH
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |