US3520098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular unit assembly for furniture or building construction
Assignee: WILLIAM B JOHNSTON
•
Filing: 1968-05-14
•
Granted: 1970-07-14
•
Expires: 1988-05-14
Abstract
No abstract record available.
Inventors
- 👤 William B Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:56
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/348; E04B1/34815; E04B1/34861; A; A47; A47B; A47B87/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189910445A
Cited
US664687A
Cited
US1362069A
Cited
US1577066A
Cited
US3224823A
Cited
US3228736A
Cited
US3329473A
Cited
US3422775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |