US3510996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractable covering
Assignee: NICHOLAS B POPIL
•
Filing: 1966-03-17
•
Granted: 1970-05-12
•
Expires: 1986-03-17
Abstract
No abstract record available.
Inventors
- 👤 Nicholas B Popil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:10
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/16; E04B7/166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1728074A
Cited
US834287A
Cited
US1407248A
Cited
US2603171A
Cited
US2754900A
Cited
US3288158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |