US Patent No: 6,988,716
Number of patents in Portfolio can not be more than 2000
Modular lift assembly
Stats
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Jan 24, 2006
Issued date -
Oct 19, 2002
filing date -
10/274,725
serial no -
In Force
status
Importance
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Abstract
A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up maintains a predetermined fleet angle between a take off point from the drum and the head block.
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First Claim
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,141,085 Hoist load brake | 20 | 1990 | |
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| 4,324,386 Battens system for raising and lowering sceneries or similar loads on a stage | 22 | 1980 | |
| 4,662,628 Device for maneuvering scenery | 23 | 1985 | |
| 5,361,565 Elevating system | 33 | 1993 | |
| 6,520,485 Winch system for raising and lowering theatre scenery | 22 | 2000 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 24, 2013 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 24, 2017 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |