US3474582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building system
Assignee: BUILDING RESEARCH Inc
•
Filing: 1967-01-16
•
Granted: 1969-10-28
•
Expires: 1987-01-16
Abstract
No abstract record available.
Inventors
- 👤 Joe M Wah
- 👤 Theodore A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:26
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/343; E04B1/34315; E04B1/18; E04B1/24; E04B2001/2466; E04B2001/2472; E04B2001/2481; E04B2001/2484; E04B2001/2496
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2795014A
Cited
US3256652A
Cited
US3152366A
Cited
FR1313383A
Cited
GB974704A
Cited
US3251163A
Cited
US3349527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |