US3543458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic floor structure with air passages
Assignee: Individual
•
Filing: 1967-12-27
•
Granted: 1970-12-01
•
Expires: 1987-12-27
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Guritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:59
CPC Classifications
E; E04; E04G; E04G11/00; E04G11/36; E04G11/40; E04G11/46; E04B; E04B5/00; E04B5/16; E04B5/17; E04B5/18; E04B5/21; E04B5/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US640176A
Cited
US918231A
Cited
US1343326A
Cited
US1338567A
Cited
US2093401A
Cited
US2611261A
Cited
CH361384A
Cited
US3238278A
Cited
US3229004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |