Patent US2720920A successfully refreshed from Google Patents.
US2720920A
Expired / Lapsed
US
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Door body
Assignee: Individual
•
Filing: 1952-09-27
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Granted: 1955-10-18
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Expires: 1972-09-27
Abstract
No abstract record available.
Inventors
- 👤 Oliver C Eckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:36
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70; E06B3/72; E06B3/78; E06B3/82; E06B3/822; E06B3/7015; E06B2003/7032; E06B3/80; Y; Y10; Y10S; Y10S160/00; Y10S160/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1091905A
Cited
US1919419A
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US2009142A
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US2160151A
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US2399666A
Cited
US2279572A
Cited
US2377684A
Cited
US2482592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |