US3302749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derrick scaffold structure
Assignee: Individual
•
Filing: 1965-05-10
•
Granted: 1967-02-07
•
Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 William G Heaphy
- 👤 Mclanahan Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/18; B66C23/26; B66C23/28; B66C23/32; E; E04; E04G; E04G5/00; E04G5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SUPPORTING STRUCTURE FOR A DERRICK COMPRISING STAGING UNITS EACH INCLUDING CORNER POSTS, MEANS FOR CONNECTING THE POSTS TO PROVIDE A RECTANGULAR OPEN FRAME SECTION, MEANS CONNECTING SAID POSTS FOR SUPPORTING REMOVABLE FLOORING MEANS, ONE OF SAID FRAME SECTIONS AT ITS UPPER END BEING ADAPTED TO MOUNT THE CAB OF A DERRICK, GUIDE PINS DETACHABLY CONNECTING THE CAB TO THE FRAME SECTION, A POWER OPERATED LIFT UNIT DEPENDING FROM THE CAB INCLUDING A MOVABLE FOOT PLATE SUPPORTED ON THE FLOORING MEANS FOR RAISING AND LOWERING THE CAB, MEANS ASSOCIATED WITH SAID LIFT UNIT FOR STEADYING ENGAGEMENT WITH SAID CORNER POSTS, AND MEANS FOR SUSPENDING EACH OF SAID UNITS OUTSIDE A BUILDING AND FROM ONE OF THE FLOORS OF THE LATTER.
Claim 2
Dependent Claim
120 words
A SUPPORTING STRUCTURE FOR A DERRICK COMPRISING STAGING UNITS EACH INCLUDING CORNER POSTS, MEANS FOR CONNECTING THE POSTS TO PROVIDE A RECTANGULAR OPEN FRAME SECTION, MEANS CONNECTING SAID POSTS FOR SUPPORTING REMOVABLE FLOORING MEANS, ONE OF SAID FRAME SECTIONS AT ITS UPPER END BEING ADAPTED TO MOUNT THE CAB OF A DERRICK, GUIDE PINS DETACHABLY CONNECTING THE CAB TO THE FRAME SECTION, A POWER OPERATED LIFT UNIT DEPENDING FROM THE CAB INCLUDING A MOVABLE FOOT PLATE SUPPORTED ON THE FLOORING MEANS FOR RAISING AND LOWERING THE CAB, MEANS ASSOCIATED WITH SAID LIFT UNIT FOR STEADYING ENGAGEMENT WITH SAID CORNER POSTS, AND MEANS FOR SUSPENDING EACH OF SAID UNITS OUTSIDE A BUILDING AND FROM ONE OF THE FLOORS OF THE LATTER.
References Cited (Backward Citations)
US2203113A
Cited
US2857026A
Cited
FR1180757A
Cited
FR76269E
Cited
US3082843A
Cited
US3084761A
Cited
US3221838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |