Patent US4535511A successfully refreshed from Google Patents.
Patent US3143773A successfully refreshed from Google Patents.
US3143773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding door accessory
Assignee: Individual
•
Filing: 1962-03-05
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Granted: 1964-08-11
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Edward R Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:50
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05F3/10; E05F3/108; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10S; Y10S292/00; Y10S292/46; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0807
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN COMBINATION WITH A SLIDING DOOR MEMBER WHICH SLIDES WITHIN A FRAME MEMBER: CLOSER MEANS COMPRISING A CYLINDER ATTACHED TO ONE OF SAID MEMBERS AND HAVING AN AXIAL LENGTH CLOSED AT ONE END, A PISTON MAKING A FLUID SEALING, SLIDING FIT IN THE CYLINDER, SPRING MEANS CONNECTED TO THE PISTON WHICH TENDS TO FORCE THE PISTON TOWARD THE CLOSED END OF THE CYLINDER, FLUID FLOW RESTRICTOR MEANS LIMITING THE RATE OF FLUID FLOW OUT OF THE CYLINDER WHEN THE PISTON MOVES TOWARD THE CLOSED END, AND INTERCONNECTING MEANS CONNECTING THE OTHER OF SAID MEMBERS TO THE PISTON, AND SO DISPOSED AND ARRANGED THAT SLIDING MOVEMENT OF THE DOOR MEMBER CHANGES THE POSITION OF THE PISTON IN THE CYLINDER, THE PISTON''S CLOSEST APPROACH TO THE CLOSED END OCCURRING WHEN THE DOOR MEMBER CLOSES THE FRAME; AND LOCK MEANS FOR SAID DOOR MEMBER COM-
Claim 2
Dependent Claim
142 words
IN COMBINATION WITH A SLIDING DOOR MEMBER WHICH SLIDES WITHIN A FRAME MEMBER: CLOSER MEANS COMPRISING A CYLINDER ATTACHED TO ONE OF SAID MEMBERS AND HAVING AN AXIAL LENGTH CLOSED AT ONE END, A PISTON MAKING A FLUID SEALING, SLIDING FIT IN THE CYLINDER, SPRING MEANS CONNECTED TO THE PISTON WHICH TENDS TO FORCE THE PISTON TOWARD THE CLOSED END OF THE CYLINDER, FLUID FLOW RESTRICTOR MEANS LIMITING THE RATE OF FLUID FLOW OUT OF THE CYLINDER WHEN THE PISTON MOVES TOWARD THE CLOSED END, AND INTERCONNECTING MEANS CONNECTING THE OTHER OF SAID MEMBERS TO THE PISTON, AND SO DISPOSED AND ARRANGED THAT SLIDING MOVEMENT OF THE DOOR MEMBER CHANGES THE POSITION OF THE PISTON IN THE CYLINDER, THE PISTON''S CLOSEST APPROACH TO THE CLOSED END OCCURRING WHEN THE DOOR MEMBER CLOSES THE FRAME; AND LOCK MEANS FOR SAID DOOR MEMBER COM-
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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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |