Patent US3247509A successfully refreshed from Google Patents.
US3247509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave identification of railroad cars
Assignee: American Brake Shoe Co
•
Filing: 1963-10-04
•
Granted: 1966-04-19
•
Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Omer F Hamann
- 👤 Sherman H Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
B; B61; B61L; B61L25/00; B61L25/02; B61L25/04; G; G01; G01S; G01S13/00; G01S13/74; G01S13/75; G01S13/751; G01S7/00; G01S7/02; G01S7/024; G01S7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AN AUTOMATIC VEHICLE IDENTIFYING SYSTEM FOR RAILROAD CARS AND LIKE VEHICLES COMPRISING: A ROADSIDE SCANNING STATION INCLUDING A SOURCE OF MICROWAVE SIGNALS AT A GIVEN FREQUENCY, A MICROWAVE TRANSMITTER ANTENNA COUPLED TO SAID SIGNAL SOURCE FOR RADIATING SAID SIGNAL, AND A MICROWAVE RECEIVER ANTENNA; AND A PLURALITY OF CODED IDENTIFICATION MEMBERS, EACH MOUNTED ON AN INDIVIDUAL VEHICLE IN POSITION TO REFLECT MICROWAVE RADIATIONS EMITTED BY SAID TRANSMITTER ANTENNA BACK TO SAID RECEIVER ANTENNA WHENEVER SAID VEHICLE TRAVERSES SAID SCANNING STATION, EACH OF SAID CODED IDENTIFICATION MEMBERS INCLUDING A PLURALITY OF REFLECTOR ELEMENTS RESONANT AT SAID GIVEN FREQUENCY.
Claim 2
Dependent Claim
97 words
AN AUTOMATIC VEHICLE IDENTIFYING SYSTEM FOR RAILROAD CARS AND LIKE VEHICLES COMPRISING: A ROADSIDE SCANNING STATION INCLUDING A SOURCE OF MICROWAVE SIGNALS AT A GIVEN FREQUENCY, A MICROWAVE TRANSMITTER ANTENNA COUPLED TO SAID SIGNAL SOURCE FOR RADIATING SAID SIGNAL, AND A MICROWAVE RECEIVER ANTENNA; AND A PLURALITY OF CODED IDENTIFICATION MEMBERS, EACH MOUNTED ON AN INDIVIDUAL VEHICLE IN POSITION TO REFLECT MICROWAVE RADIATIONS EMITTED BY SAID TRANSMITTER ANTENNA BACK TO SAID RECEIVER ANTENNA WHENEVER SAID VEHICLE TRAVERSES SAID SCANNING STATION, EACH OF SAID CODED IDENTIFICATION MEMBERS INCLUDING A PLURALITY OF REFLECTOR ELEMENTS RESONANT AT SAID GIVEN FREQUENCY.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |