US2988810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arched roof housing structure
Assignee: Individual
•
Filing: 1958-09-17
•
Granted: 1961-06-20
•
Expires: 1978-09-17
Abstract
No abstract record available.
Inventors
- 👤 Walter C Wilken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:40
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49867; Y10T29/49869; Y10T29/49892
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US946066A
Cited
US1267084A
Cited
US1549251A
Cited
US2234906A
Cited
US2360285A
Cited
US2415240A
Cited
US2427021A
Cited
US2826157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |