US3537688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible windbreak
Assignee: Individual
•
Filing: 1968-12-16
•
Granted: 1970-11-03
•
Expires: 1988-12-16
Abstract
No abstract record available.
Inventors
- 👤 Bertha Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:00
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/003; E04H15/005; Y; Y10; Y10S; Y10S135/00; Y10S135/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US185559A
Cited
US1669484A
Cited
US1123657A
Cited
US1672338A
Cited
US1930404A
Cited
US2196544A
Cited
US2208458A
Cited
US2997277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |