US3197819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking automatically-releasing sash balance for removable sash windows
Assignee: Individual
•
Filing: 1963-03-25
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Granted: 1965-08-03
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Expires: 1983-03-25
Abstract
No abstract record available.
Inventors
- 👤 Donald M Trout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/04; E05D13/08; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A SELF-LOCKING AUTOMATICALLY-RELEASING SASH BALANCE FOR A REMOVABLE SASH WINDOW, COMPRISING AN ELONGATED HOLLOW SASH BALANCE CASING HAVING A WALL STRUCTURE WITH AN ELONGATED OPENING THEREIN, A RESILIENT SASH BALANCING MEMBER ANCHORED TO SAID CASING AND DISPOSED THEREIN, A LOCK CARRIER RECIPROCABLY MOUNTED IN SAID CASING IN GUIDED RELATIONSHIP THEREWITH AND HAVING A FULCRUM THEREON SPACED INWARDLY AWAY FROM SAID OPENING, AND AN APPROXIMATELY T-SHAPED LOCKING MEMBER DISPOSED SUBSTANTIALLY IN ITS ENTIRETY WITHIN SAID HOLLOW CASING AND HAVING A FULCRUM REST TILTABLY ENGAGING SAID FULCRUM, A TRIGGER ARM EXTENDING FROM SAID FUL-
Claim 2
Dependent Claim
92 words
A SELF-LOCKING AUTOMATICALLY-RELEASING SASH BALANCE FOR A REMOVABLE SASH WINDOW, COMPRISING AN ELONGATED HOLLOW SASH BALANCE CASING HAVING A WALL STRUCTURE WITH AN ELONGATED OPENING THEREIN, A RESILIENT SASH BALANCING MEMBER ANCHORED TO SAID CASING AND DISPOSED THEREIN, A LOCK CARRIER RECIPROCABLY MOUNTED IN SAID CASING IN GUIDED RELATIONSHIP THEREWITH AND HAVING A FULCRUM THEREON SPACED INWARDLY AWAY FROM SAID OPENING, AND AN APPROXIMATELY T-SHAPED LOCKING MEMBER DISPOSED SUBSTANTIALLY IN ITS ENTIRETY WITHIN SAID HOLLOW CASING AND HAVING A FULCRUM REST TILTABLY ENGAGING SAID FULCRUM, A TRIGGER ARM EXTENDING FROM SAID FUL-
References Cited (Backward Citations)
US2933757A
Cited
US2989773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |