US3256641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window units
Assignee: Malta Manufacturing Co
•
Filing: 1962-12-20
•
Granted: 1966-06-21
•
Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:47
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/54; E06B3/56; E06B3/32; E06B3/34; E06B3/42; E06B3/44; E06B3/5454; E06B2003/4438; E06B2003/4461; E06B3/4407
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
IN A WINDOW UNIT HAVING A HOLLOW FRAME AND A SLIDING SASH DISPOSED IN SAID FRAME AND HAVING SUBSTANTIALLY PARALLEL SASH RAILS, A SASH GUIDE ASSEMBLY COMPRISING: (A) A SASH-GUIDING TRACK ASSEMBLY ON ONE SIDE OF SAID FRAME; (B) AN ELONGATED GUIDE RAIL PROTRUDING INTERMEDIATELY FROM SAID TRACK ASSEMBLY; (C) H-SHAPED SECTIONS ON SAID SASH RAILS HAVING END PORTIONS INCLUDING FLANGES FOR CONTRACTING OPPOSITE SIDES OF SAID PROTRUDING INTERMEDIATE GUIDE RAIL; AND (D) MEANS ON A SASH RAIL FOR SELECTIVELY VARYING THE SPACED RELATIONSHIP OF SAID GUIDE RAIL CONTACTING FLANGES TO CONTROL THE SLIDING FRICTION BETWEEN SAID TRACK ASSEMBLY AND SAID SASH.
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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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |