US3537742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift sling construction
Assignee: BOYD C BLACK
•
Filing: 1969-01-31
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Granted: 1970-11-03
•
Expires: 1989-01-31
Abstract
No abstract record available.
Inventors
- 👤 Boyd C Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
D; D07; D07B; D07B1/00; D07B1/18; D07B1/185; B; B66; B66C; B66C1/00; B66C1/10; B66C1/12; D07B1/02; D07B1/06; D07B1/0673; D07B2201/00; D07B2201/20; D07B2201/2083; D07B2201/2089
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |