Patent US3253552A successfully refreshed from Google Patents.
US3253552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trolley systems
Assignee: Industrial Acoustics Co Inc
•
Filing: 1964-05-26
•
Granted: 1966-05-31
•
Expires: 1984-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert R Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:40
CPC Classifications
B; B61; B61F; B61F11/00; E; E05; E05D; E05D15/00; E05D15/06; E05D15/0604; E05D15/0608; E05D15/0613
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A MOVABLE WALL SYSTEM, THE COMBINATION OF A HORIZONTAL CEILING TRACK INCLUDING PARALLEL, SPACED-APART, PLANAR SUPPORT MEMBERS; A WELL PANEL HAVING A VERTICAL DIMENSION LESS THAN THE DISTANCE BETWEEN SAID CEILING TRACK AND THE FLOOR BELOW WHEN SAID WALL SECTION IS IN A RETRACTED CONDITION, AND INCLUDING MEANS FOR EXTENDING SAID WALL PANEL SO THAT THE SAME ENGAGES SAID CEILING TRACK AND THE FLOOR BELOW, AND A PAIR OF TROLLEYS FOR SUPPORTING SAID WALL PANEL SPACED ABOVE THE FLOOR WHEN SAID WALL PANEL IS IN SAID RETRACTED CONDITION; EACH OF SAID TROLLEYS COMPRISING A BEARING PLATE, MEANS FOR SUSPENDING SAID WALL PANEL FROM SAID BEARING PALTE, AND AT LEAST NINE SPHERICAL BEARING MEMBERS EQUALLY SPACED-APART ABOUT A CIRCULAR PATH CENTERED AROUND SAID MEANS FOR SUSPENDING SAID WALL SECTION AND ADAPTED TO MOVABLY SUPPORT SAID BEARING PLATE UPON SAID SPACED APART SUPPORT MEMBERS.
Claim 2
Dependent Claim
143 words
IN A MOVABLE WALL SYSTEM, THE COMBINATION OF A HORIZONTAL CEILING TRACK INCLUDING PARALLEL, SPACED-APART, PLANAR SUPPORT MEMBERS; A WELL PANEL HAVING A VERTICAL DIMENSION LESS THAN THE DISTANCE BETWEEN SAID CEILING TRACK AND THE FLOOR BELOW WHEN SAID WALL SECTION IS IN A RETRACTED CONDITION, AND INCLUDING MEANS FOR EXTENDING SAID WALL PANEL SO THAT THE SAME ENGAGES SAID CEILING TRACK AND THE FLOOR BELOW, AND A PAIR OF TROLLEYS FOR SUPPORTING SAID WALL PANEL SPACED ABOVE THE FLOOR WHEN SAID WALL PANEL IS IN SAID RETRACTED CONDITION; EACH OF SAID TROLLEYS COMPRISING A BEARING PLATE, MEANS FOR SUSPENDING SAID WALL PANEL FROM SAID BEARING PALTE, AND AT LEAST NINE SPHERICAL BEARING MEMBERS EQUALLY SPACED-APART ABOUT A CIRCULAR PATH CENTERED AROUND SAID MEANS FOR SUSPENDING SAID WALL SECTION AND ADAPTED TO MOVABLY SUPPORT SAID BEARING PLATE UPON SAID SPACED APART SUPPORT MEMBERS.
References Cited (Backward Citations)
US1803172A
Cited
US1443382A
Cited
US1729954A
Cited
US2184860A
Cited
US2146289A
Cited
US2350513A
Cited
CH269371A
Cited
DE932478C
Cited
US2922202A
Cited
US2982380A
Cited
US3072975A
Cited
US3095174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |