Ahlstone; Arthur G.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ahlstone; Arthur G..The latest application filed is for "locking device for fluorescent lamps".
- Ahlstone; Arthur G. - Ventura CA
| Patent | Date |
|---|---|
| Locking device for fluorescent lamps Grant 5,282,755 - Ahlstone February 1, 1 | 1994-02-01 |
| Retrievable guide base for subsea well Grant 5,069,287 - Short , et al. December 3, 1 | 1991-12-03 |
| Tool for running structures in a well Grant 4,880,061 - Ahlstone November 14, 1 | 1989-11-14 |
| Subsea tubing hanger Grant 4,736,799 - Ahlstone April 12, 1 | 1988-04-12 |
| Buoyant ring gasket installation tool Grant 4,618,285 - Ahlstone October 21, 1 | 1986-10-21 |
| Driveable pile connections Grant 4,444,421 - Ahlstone April 24, 1 | 1984-04-24 |
| Flexible ring gasket retainer for flanged connectors Grant 4,294,477 - Ahlstone October 13, 1 | 1981-10-13 |
| Ring gasket retainer for flanged connectors Grant 4,272,109 - Ahlstone June 9, 1 | 1981-06-09 |
| Rigid connector for large diameter pipe Grant 4,209,193 - Ahlstone June 24, 1 | 1980-06-24 |
| Ring gasket retainer for flanged connectors Grant 4,168,852 - Ahlstone September 25, 1 | 1979-09-25 |
| Shiftable ring gasket retainer for flanged connectors Grant 4,168,853 - Ahlstone September 25, 1 | 1979-09-25 |
| Hydraulically operated misalignment connector Grant 4,153,278 - Ahlstone May 8, 1 | 1979-05-08 |
| Misalignment pipe connector Grant 4,133,558 - Ahlstone January 9, 1 | 1979-01-09 |
| Rigid pipe connector with radially shiftable lock elements and method of making the same Grant 4,124,231 - Ahlstone November 7, 1 | 1978-11-07 |
| Rigid pipe connector with lock elements and method of making the same Grant 4,124,232 - Ahlstone November 7, 1 | 1978-11-07 |
| Rigid connector for pipe and method of making the same Grant 4,124,229 - Ahlstone November 7, 1 | 1978-11-07 |
| Lockable rigid connector for pipe and method of making the same Grant 4,120,520 - Ahlstone October 17, 1 | 1978-10-17 |
| Wellhead seal apparatus and pulling tool for releasing and retrieving such apparatus Grant 4,030,544 - Ahlstone June 21, 1 | 1977-06-21 |
| Apparatus for setting and locking packing assemblies in wellheads Grant 3,933,202 - Ahlstone January 20, 1 | 1976-01-20 |
| Casing hanger and packing running apparatus Grant 3,924,678 - Ahlstone December 9, 1 | 1975-12-09 |
| Apparatus for setting and locking packing assemblies in subsurface wellheads Grant 3,913,670 - Ahlstone October 21, 1 | 1975-10-21 |
| Rotatably releasable casing hanger and packing running apparatus Grant 3,897,823 - Ahlstone August 5, 1 | 1975-08-05 |
| Well casing running, cementing and flushing apparatus Grant 3,885,625 - Ahlstone May 27, 1 | 1975-05-27 |
| Casing hanger and packoff apparatus Grant 3,871,449 - Ahlstone March 18, 1 | 1975-03-18 |
| Mudline Emergency Shutoff For Offshore Wells Grant 3,850,237 - Ahlstone , et al. November 26, 1 | 1974-11-26 |
| Light Weight Marine Riser Pipe Grant 3,768,842 - Ahlstone October 30, 1 | 1973-10-30 |
| Compensating And Sensing Apparatus For Well Bore Drilling Vessels Grant 3,721,293 - Ahlstone , et al. March 20, 1 | 1973-03-20 |
| Method Of Cementing A Casing String In A Well Bore And Hanging It In A Subsea Wellhead Grant 3,667,547 - Ahlstone June 6, 1 | 1972-06-06 |
| Direct Drive Casing Hanger Apparatus Grant 3,638,725 - Ahlstone February 1, 1 | 1972-02-01 |
| Well Bore Casing Hanger Apparatus Grant 3,625,283 - Ahlstone December 7, 1 | 1971-12-07 |
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