US3381436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building structure with a waterproof seal
Assignee: Individual
•
Filing: 1965-03-15
•
Granted: 1968-05-07
•
Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Elliott Norman Barton
- 👤 Greensmith Robert Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:16
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/38; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6803; E04D3/36; E04D3/366
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2405643A
Cited
US3043730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |