Patent US3449878A successfully refreshed from Google Patents.
US3449878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building bricks or blocks and structures utilising the same
Assignee: Individual
•
Filing: 1967-03-22
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Granted: 1969-06-17
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Expires: 1987-03-22
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Benjamin Hern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:17
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/40; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/16; E04B2/18; E04B2002/0202; E04B2002/0204; E04B2002/0295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US903907A
Cited
US1607583A
Cited
US2141397A
Cited
FR53998E
Cited
GB613245A
Cited
GB735945A
Cited
FR1156862A
Cited
US3305982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |