US3463547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible chair seat
Assignee: HAROLD R SPARKS
•
Filing: 1967-10-20
•
Granted: 1969-08-26
•
Expires: 1987-10-20
Abstract
No abstract record available.
Inventors
- 👤 John M Brennan
- 👤 Harold R Sparks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/16; A47C7/029
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2488728A
Cited
US3061374A
Cited
US3177036A
Cited
US3138404A
Cited
US3253860A
Cited
US3389936A
Cited
US3376070A
Cited
US3393012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |