Patent US3443340A successfully refreshed from Google Patents.
US3443340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable spring-loaded supporting roller assembly for sliding doors and the like
Assignee: Individual
•
Filing: 1967-08-14
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Granted: 1969-05-13
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Expires: 1987-08-14
Abstract
No abstract record available.
Inventors
- 👤 B J Helmick
- 👤 Harold Clyde Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:51
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/06; E05D15/0621; E05D15/066; E05D15/0665; E05D15/0669; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1086316A
Cited
US3090084A
Cited
US3120033A
Cited
US3283444A
Cited
US3284953A
Cited
US3299575A
Cited
US3386208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |