US3131961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoisting devices
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1962-04-23
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Granted: 1964-05-05
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Expires: 1982-04-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Van Doros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:26
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/42; B66C1/44; B66C1/54; B29; B29D; B29D30/00; B29D30/0016; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A HOISTING DEVICE OF THE TYPE ADAPTED TO PICK UP AND SUPPORT ANNULAR OBJECTS OR THE LIKE WHICH COMPRISES IN COMBINATION: A SUPPORTING MEANS; A PLURALITY OF OBJECT ENGAGING ARMS PIVOTALLY MOUNTED TO SAID SUPPORTING MEANS, SAID ARMS ADAPTED TO SWING IN A COPLANAR RELATIONSHIP TO ONE ANOTHER, SAID ARMS ALSO ADAPTED TO SWING OUTWARDLY FROM SAID SUPPORT TO ENGAGE A SURFACE OF AN ANNULAR OBJECT TO BE LIFTED, SAID ARMS BEING FRICTIONALLY RETAINED
Claim 2
Dependent Claim
74 words
A HOISTING DEVICE OF THE TYPE ADAPTED TO PICK UP AND SUPPORT ANNULAR OBJECTS OR THE LIKE WHICH COMPRISES IN COMBINATION: A SUPPORTING MEANS; A PLURALITY OF OBJECT ENGAGING ARMS PIVOTALLY MOUNTED TO SAID SUPPORTING MEANS, SAID ARMS ADAPTED TO SWING IN A COPLANAR RELATIONSHIP TO ONE ANOTHER, SAID ARMS ALSO ADAPTED TO SWING OUTWARDLY FROM SAID SUPPORT TO ENGAGE A SURFACE OF AN ANNULAR OBJECT TO BE LIFTED, SAID ARMS BEING FRICTIONALLY RETAINED
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |