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Patent US2568326A successfully refreshed from Google Patents.
US2568326A
Expired / Lapsed
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Compensating hairspring
Assignee: Individual
•
Filing: 1950-06-01
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Granted: 1951-09-18
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Expires: 1970-06-01
Abstract
No abstract record available.
Inventors
- 👤 Dubois Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:52
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/08; G; G04; G04B; G04B17/00; G04B17/20; G04B17/22; G04B17/227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A COMPENSATING HAIRSPRING OF AN ELASTICITY AT LEAST EQUAL TO THAT OF TEMPERED STEEL HAIRSPRINGS, AND CONSTITUTED BY AN ALLOY SUCH THAT THE STRICT COMPENSATION OBTAINED BY ASSOCIATION WITH A MONO-METALLIC BALANCE-WHEEL OF THE UNCUT NICKEL TYPE IS ENSURED BY THE AID OF THE ALPHA-IRONNICKEL COMPLEX, THE NICKEL BEING IN A PROPORTION OF 24 TO 27 PER CENT., WITH AUXILIARY ADDITIONS COMPOSED IN SUCH A WAY THAT THE TEMPERATURE PERMITTING PERFECT FIXING TO BE OBTAINED IS AT THE MAXIMUM 550 DEGREES CENTIGRADE, CONSTITUTED BY AN ALLOY THE COMPOSITION OF WHICH IS INCLUDED BETWEEN THE FOLLOWING LIMITS:
Claim 2
Dependent Claim
96 words
A COMPENSATING HAIRSPRING OF AN ELASTICITY AT LEAST EQUAL TO THAT OF TEMPERED STEEL HAIRSPRINGS, AND CONSTITUTED BY AN ALLOY SUCH THAT THE STRICT COMPENSATION OBTAINED BY ASSOCIATION WITH A MONO-METALLIC BALANCE-WHEEL OF THE UNCUT NICKEL TYPE IS ENSURED BY THE AID OF THE ALPHA-IRONNICKEL COMPLEX, THE NICKEL BEING IN A PROPORTION OF 24 TO 27 PER CENT., WITH AUXILIARY ADDITIONS COMPOSED IN SUCH A WAY THAT THE TEMPERATURE PERMITTING PERFECT FIXING TO BE OBTAINED IS AT THE MAXIMUM 550 DEGREES CENTIGRADE, CONSTITUTED BY AN ALLOY THE COMPOSITION OF WHICH IS INCLUDED BETWEEN THE FOLLOWING LIMITS:
References Cited (Backward Citations)
CH15527A
Cited
US2507698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |