US3478474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof construction
Assignee: KARL N INGVAR JOHANSSON
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Filing: 1967-10-02
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Granted: 1969-11-18
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Expires: 1987-10-02
Abstract
No abstract record available.
Inventors
- 👤 Karl N Ingvar Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/02; E04D; E04D13/00; E04D13/04; E04D13/064; E04D13/15; E04D13/158; E04D3/00; E04D3/24; E04D3/30; E04D3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |