Patent US4639898A successfully refreshed from Google Patents.
US3511533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chairs
Assignee: FRITZ E DRABERT
•
Filing: 1967-11-17
•
Granted: 1970-05-12
•
Expires: 1987-11-17
Abstract
No abstract record available.
Inventors
- 👤 Fritz E Drabert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:40
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/022; A47C1/023; A47C9/00; A47C9/02; A47C9/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1247521A
Cited
US1838199A
Cited
US2006149A
Cited
US2078961A
Cited
US2446185A
Cited
US2500316A
Cited
US2646839A
Cited
US2678681A
Cited
US3235308A
Cited
US3362746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |