Patent US3331924A successfully refreshed from Google Patents.
US3331924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone systems
Assignee: Individual
•
Filing: 1966-03-24
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Granted: 1967-07-18
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Expires: 1986-03-24
Abstract
No abstract record available.
Inventors
- 👤 Reaves Michael John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:21
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/56; H04M9/00; H04M9/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A TELEPHONE SYSTEM HAVING AT LEAST TWO COMMON SUBSCRIBER INSTRUMENTS, EACH HAVING A RECEIVER AND TRANSMITTER CIRCUIT, A PLURALITY OF LINES TERMINATING AT EACH OF THE INSTRUMENTS, HOLDING MEANS INDIVIDUAL TO EACH OF SAID LINES AND OPERABLE AT EACH OF THE INSTRUMENTS FOR PLACING HOLDING CONDITIONS ON EACH OF SAID LINES, AND KEY MEANS FOR SELECTIVELY AND INDIVIDUALLY CONNECTING SAID LINES TO SAID RECEIVER AND TRANSMITTER CIRCUIT; CONFERENCE MEANS OPERABLE AT ONE OF THE INSTRUMENTS FOR OPERATIVELY CONNECTING THE RECEIVER AND TRANSMITTER CIRCUITS OF TWO OF SAID SUBSCRIBER INSTRUMENTS TO ONE ANOTHER WHEREBY A PARTY EMPLOYING ONE OF SAID INSTRUMENTS MAY HOLD A THREE PARTY CONFERENCE WITH A PARTY ON ONE LINE CONNECTED BY ITS ASSOCIATED KEY MEANS TO THE RECEIVER AND TRANSMITTER CIRCUIT OF ONE OF THE TWO INSTRUMENTS AND A PARTY ON ANOTHER LINE CONNECTED BY ITS ASSOCIATED KEY MEANS TO THE RECEIVER AND TRANSMITTER CIRCUIT OF THE OTHER OF THE TWO INSTRUMENTS.
Claim 2
Dependent Claim
156 words
IN A TELEPHONE SYSTEM HAVING AT LEAST TWO COMMON SUBSCRIBER INSTRUMENTS, EACH HAVING A RECEIVER AND TRANSMITTER CIRCUIT, A PLURALITY OF LINES TERMINATING AT EACH OF THE INSTRUMENTS, HOLDING MEANS INDIVIDUAL TO EACH OF SAID LINES AND OPERABLE AT EACH OF THE INSTRUMENTS FOR PLACING HOLDING CONDITIONS ON EACH OF SAID LINES, AND KEY MEANS FOR SELECTIVELY AND INDIVIDUALLY CONNECTING SAID LINES TO SAID RECEIVER AND TRANSMITTER CIRCUIT; CONFERENCE MEANS OPERABLE AT ONE OF THE INSTRUMENTS FOR OPERATIVELY CONNECTING THE RECEIVER AND TRANSMITTER CIRCUITS OF TWO OF SAID SUBSCRIBER INSTRUMENTS TO ONE ANOTHER WHEREBY A PARTY EMPLOYING ONE OF SAID INSTRUMENTS MAY HOLD A THREE PARTY CONFERENCE WITH A PARTY ON ONE LINE CONNECTED BY ITS ASSOCIATED KEY MEANS TO THE RECEIVER AND TRANSMITTER CIRCUIT OF ONE OF THE TWO INSTRUMENTS AND A PARTY ON ANOTHER LINE CONNECTED BY ITS ASSOCIATED KEY MEANS TO THE RECEIVER AND TRANSMITTER CIRCUIT OF THE OTHER OF THE TWO INSTRUMENTS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |