US2908048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated building panels
Assignee: Walter & Johnson
•
Filing: 1956-06-28
•
Granted: 1959-10-13
•
Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Howard A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:01
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/02; E04B1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US758645A
Cited
US794595A
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US2226332A
Cited
US2387659A
Cited
US2401589A
Cited
US2624920A
Cited
US2832101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |