US2944281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced door construction
Assignee: Roto Swing Door Co Inc
•
Filing: 1956-07-05
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Granted: 1960-07-12
•
Expires: 1976-07-05
Abstract
No abstract record available.
Inventors
- 👤 John A Gulick
- 👤 John C Catlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:33
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/28; E05D15/30; E05F; E05F15/00; E05F15/50; E05F15/53; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/43; E05Y2201/448; E05Y2600/00; E05Y2600/40; E05Y2600/46; E05Y2900/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |