Patent DE823456C successfully refreshed from Google Patents.
US2839792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slab door
Assignee: Individual
•
Filing: 1954-09-13
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Granted: 1958-06-24
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Expires: 1974-09-13
Abstract
No abstract record available.
Inventors
- 👤 Paul L Sanders
- 👤 Francis E Haley
- 👤 Rupert G Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:43
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/96; E06B3/984; E06B3/70; E06B3/82; E06B3/822; E06B3/825; E06B2003/7059; E06B2003/7061; E06B2003/7071; E06B2003/7092; Y; Y10; Y10T; Y10T403/00; Y10T403/54; Y10T403/70; Y10T428/00; Y10T428/24; Y10T428/24174; Y10T428/24182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US552578A
Cited
CA489518A
Cited
FR770526A
Cited
US2229279A
Cited
US2152694A
Cited
US2622999A
Cited
US2668788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |