US2686340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-balancing door
Assignee: MULTIPLE PRODUCTS CORP
•
Filing: 1953-07-02
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Granted: 1954-08-17
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Expires: 1973-07-02
Abstract
No abstract record available.
Inventors
- 👤 Hayden W Shepard
- 👤 Jr Warren H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:58
CPC Classifications
A; A47; A47B; A47B41/00; A47B41/02; E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1246; E05F1/1269; E05F1/1276; A47B2220/00; A47B2220/0061; A47B2220/0069; A47B2220/0072; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/146; E05Y2900/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2617144A
Cited
US2641795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |