Patent US2007689A successfully refreshed from Google Patents.
US2007689A
Expired / Lapsed
US
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Insulated monolithic hollow wall construction
Assignee: Individual
•
Filing: 1934-04-23
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Granted: 1935-07-09
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Expires: 1954-04-23
Abstract
No abstract record available.
Inventors
- 👤 George A Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:54
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-07-08 | 1939-01-07 | 1939-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-08 | 1943-01-07 | 1943-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-08 | 1947-01-07 | 1947-07-09 | $7700.00 | Window Closed / Lapsed |