Patent US3503167A successfully refreshed from Google Patents.
US3503167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structure with different foam layers
Assignee: United States Department of the Navy
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Filing: 1968-09-25
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Granted: 1970-03-31
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Expires: 1988-09-25
Abstract
No abstract record available.
Inventors
- 👤 William L Mackie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:16
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/04; E04B; E04B1/00; E04B1/16; E04B1/167; E04B1/168; E04B1/169; E04G11/045; E04H; E04H15/00; E04H15/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49826; Y10T29/49885; Y10T29/49888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |