US2651814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doorframe
Assignee: Individual
•
Filing: 1952-05-22
•
Granted: 1953-09-15
•
Expires: 1972-05-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Lawson L Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:39
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/04; E06B1/06; E06B1/08; E06B1/56; E06B1/60; E06B1/6069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US385233A
Cited
US593435A
Cited
US1677058A
Cited
US1855470A
Cited
US1926673A
Cited
US2185650A
Cited
US2309452A
Cited
US2293648A
Cited
US2489029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |