Patent US1239976A successfully refreshed from Google Patents.
US3097271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric limit switch
Assignee: R B DENISON Manufacturing CO
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Filing: 1960-04-25
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Granted: 1963-07-09
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Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 Robert B Denison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:23
CPC Classifications
H; H01; H01H; H01H21/00; H01H21/02; H01H21/18; H01H21/22; H01H21/24; H01H21/28; H01H21/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
IN AN ELECTRICAL SWITCH, THE IMPROVEMENT WHICH COMPRISES A CONTACT BLOCK OF INSULATION MATERIAL HAVING A CHAMBER THEREIN, SAID CONTACT BLOCK HAVING SIDE WALLS AT OPPOSITE SIDES OF SAID CHAMBER AND HAVING AN OPENING BETWEEN SAID WALLS WHICH LEADS INTO SAID CHAMBER, ONE OF SAID SIDE WALLS OF THE BLOCK HAVING A SINGLE RECESS THEREIN WHICH COMMUNICATES WITH SAID CHAMBER, SAID CHAMBER AND SAID RECESS BEING OPEN AT ONE END OF THE CONTACT BLOCK, AND A STATIONARY CONTACT HAVING A FIRST PORTION SNUGLY RECEIVED IN SAID RECESS AND SHAPED AND DIMENSIONED TO BE SLIDABLY INSERTED INTO AND REMOVED FROM SAID RECESS, SAID STATIONARY CONTACT HAVING A SECOND PORTION DISPOSED IN SAID CHAMBER AND EXTENDING SUBSTANTIALLY PARALLEL TO SAID ONE SIDE WALL, SAID SECOND PORTION SPACED FROM SAID BLOCK, AND SAID STATIONARY CONTACT HAVING A LEG WHICH EXTENDS TRANSVERSELY FROM SAID SECOND PORTION INTO SNUG ENGAGEMENT WITH SAID ONE SIDE WALL IN SPACED RELATIONSHIP TO SAID RECESS, AND AN ELECTRICAL CONTACT SURFACE ON SAID SECOND PORTION OF THE STATIONARY CONTACT AND FACING AWAY FROM SAID ONE SIDE WALL OF THE CONTACT BLOCK, SAID SURFACE LOCATED BETWEEN SAID RECESS AND SAID LEG.
Claim 2
Dependent Claim
190 words
IN AN ELECTRICAL SWITCH, THE IMPROVEMENT WHICH COMPRISES A CONTACT BLOCK OF INSULATION MATERIAL HAVING A CHAMBER THEREIN, SAID CONTACT BLOCK HAVING SIDE WALLS AT OPPOSITE SIDES OF SAID CHAMBER AND HAVING AN OPENING BETWEEN SAID WALLS WHICH LEADS INTO SAID CHAMBER, ONE OF SAID SIDE WALLS OF THE BLOCK HAVING A SINGLE RECESS THEREIN WHICH COMMUNICATES WITH SAID CHAMBER, SAID CHAMBER AND SAID RECESS BEING OPEN AT ONE END OF THE CONTACT BLOCK, AND A STATIONARY CONTACT HAVING A FIRST PORTION SNUGLY RECEIVED IN SAID RECESS AND SHAPED AND DIMENSIONED TO BE SLIDABLY INSERTED INTO AND REMOVED FROM SAID RECESS, SAID STATIONARY CONTACT HAVING A SECOND PORTION DISPOSED IN SAID CHAMBER AND EXTENDING SUBSTANTIALLY PARALLEL TO SAID ONE SIDE WALL, SAID SECOND PORTION SPACED FROM SAID BLOCK, AND SAID STATIONARY CONTACT HAVING A LEG WHICH EXTENDS TRANSVERSELY FROM SAID SECOND PORTION INTO SNUG ENGAGEMENT WITH SAID ONE SIDE WALL IN SPACED RELATIONSHIP TO SAID RECESS, AND AN ELECTRICAL CONTACT SURFACE ON SAID SECOND PORTION OF THE STATIONARY CONTACT AND FACING AWAY FROM SAID ONE SIDE WALL OF THE CONTACT BLOCK, SAID SURFACE LOCATED BETWEEN SAID RECESS AND SAID LEG.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-08 | 1967-01-07 | 1967-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-08 | 1971-01-07 | 1971-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-08 | 1975-01-07 | 1975-07-09 | $7700.00 | Window Closed / Lapsed |