US3546833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated building block construction
Assignee: Individual
•
Filing: 1968-10-08
•
Granted: 1970-12-15
•
Expires: 1988-10-08
Abstract
No abstract record available.
Inventors
- 👤 Arnold Perreton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:10
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/42; E04B2/44; E04B2/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1637321A
Cited
US2294051A
Cited
FR985377A
Cited
US2601532A
Cited
AT175367B
Cited
US2852934A
Cited
FR1181369A
Cited
US2929238A
Cited
US3204381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |