US3348392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master-keying system
Assignee: Individual
•
Filing: 1965-05-12
•
Granted: 1967-10-24
•
Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Schreiber Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:59
CPC Classifications
E; E05; E05B; E05B27/00; E05B27/0053; E05B19/00; E05B19/0017; E05B19/0041; E05B19/0047; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7446; Y10T70/7463; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7565; Y10T70/7588; Y10T70/7593; Y10T70/7599; Y10T70/7605; Y10T70/7729; Y10T70/778; Y10T70/7791; Y10T70/7842; Y10T70/7847
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
247 words
A MASTER-KEYING SYSTEM COMPRISING: A FIRST MASTER KEY AND A SECOND MASTER KEY BOTH PROVIDED WITH SIMILAR CYLINDRICAL SHANKS; SAID FIRST MASTER KEY BEING CUT ACCORDING TO A PREDETERMINED CODE COMBINATION IN THE FORM OF SHALLOW DEPRESSIONS ON THE SURFACE OF SAID CYLINDRICAL SHANK; SAID SECOND MASTER KEY BEING CUT ACCORDING TO THE SAME CODE COMBINATION AS SAID FIRST MASTER KEY WITH AT LEAST ONE CODE DIGIT ADDED THERETO; A FIRST SERIES OF LOCKS ADAPTED TO BE OPERATED BY SAID FIRST MASTER KEY, EACH ONE OF SAID LOCKS BEING PROVIDED WITH PIN-TUMBLER ELEMENTS EACH ADAPTED TO BE DISPLACED BY EACH OF SAID SHALLOW DEPRESSIONS ON THE SURFACE OF SAID SHANK TO A PREDETERMINED POSITION DEPENDENT FROM EACH CODE DIGIT OF THE CODE COMBINATION CORRESPONDING TO EACH PIN-TUMBLER ELEMENT FOR UNLOCKING EACH ONE OF SAID LOCKS AND EACH ONE OF SAID LOCKS HAVING AT LEAST ONE OF SAID PIN-TUMBLER ELEMENTS OMITTED WHEREBY ALL THE LOCKS IN SAID FIRST SERIES DEPENDENT FROM SAID FIRST MASTER KEY ARE DIFFERENT FROM ONE ANOTHER ONLY AS TO THE PERMUTATION ORDER OF SAID OMITTED PIN-TUMBLER ELEMENT; A KEY FOR FITTING EACH SAID LOCK IN SAID FIRST SERIES, EACH KEY BEING CUT TO THE SAME CODE COMBINATION AS SAID FIRST MASTER KEY, EXCEPT THAT EACH SAID KEY IS CODED DIFFERENTLY FROM SAID FIRST MASTER KEY RELATIVELY TO THE OMITTED PIN-TUMBLER ELEMENT OF THE LOCK OPERABLE BY SAID KEY; A SECOND SERIES OF LOCKS SIMILAR IN CONSTRUCTION AND IN CODE COMBINATIONS TO THE LOCKS IN
Claim 2
Dependent Claim
247 words
A MASTER-KEYING SYSTEM COMPRISING: A FIRST MASTER KEY AND A SECOND MASTER KEY BOTH PROVIDED WITH SIMILAR CYLINDRICAL SHANKS; SAID FIRST MASTER KEY BEING CUT ACCORDING TO A PREDETERMINED CODE COMBINATION IN THE FORM OF SHALLOW DEPRESSIONS ON THE SURFACE OF SAID CYLINDRICAL SHANK; SAID SECOND MASTER KEY BEING CUT ACCORDING TO THE SAME CODE COMBINATION AS SAID FIRST MASTER KEY WITH AT LEAST ONE CODE DIGIT ADDED THERETO; A FIRST SERIES OF LOCKS ADAPTED TO BE OPERATED BY SAID FIRST MASTER KEY, EACH ONE OF SAID LOCKS BEING PROVIDED WITH PIN-TUMBLER ELEMENTS EACH ADAPTED TO BE DISPLACED BY EACH OF SAID SHALLOW DEPRESSIONS ON THE SURFACE OF SAID SHANK TO A PREDETERMINED POSITION DEPENDENT FROM EACH CODE DIGIT OF THE CODE COMBINATION CORRESPONDING TO EACH PIN-TUMBLER ELEMENT FOR UNLOCKING EACH ONE OF SAID LOCKS AND EACH ONE OF SAID LOCKS HAVING AT LEAST ONE OF SAID PIN-TUMBLER ELEMENTS OMITTED WHEREBY ALL THE LOCKS IN SAID FIRST SERIES DEPENDENT FROM SAID FIRST MASTER KEY ARE DIFFERENT FROM ONE ANOTHER ONLY AS TO THE PERMUTATION ORDER OF SAID OMITTED PIN-TUMBLER ELEMENT; A KEY FOR FITTING EACH SAID LOCK IN SAID FIRST SERIES, EACH KEY BEING CUT TO THE SAME CODE COMBINATION AS SAID FIRST MASTER KEY, EXCEPT THAT EACH SAID KEY IS CODED DIFFERENTLY FROM SAID FIRST MASTER KEY RELATIVELY TO THE OMITTED PIN-TUMBLER ELEMENT OF THE LOCK OPERABLE BY SAID KEY; A SECOND SERIES OF LOCKS SIMILAR IN CONSTRUCTION AND IN CODE COMBINATIONS TO THE LOCKS IN
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |