Citing unreleased documents, Lockheed Martin Corp. alleged in a court filing that former Air Force official Darleen A. Druyun shared with senior Boeing Co. officials proprietary Lockheed information during a 1990s rocket launch competition.

The November court filing relies on notes from a meeting Druyun attended and an e-mail from Harry C. Stonecipher, Boeing's chief executive, but details from both are redacted in the version made public. Lockheed declined to release an unedited version.

"High-level Boeing officials discussed their proposal strategy and Lockheed Martin's pricing with Ms. Druyun shortly before final EELV [rocket launch] proposal submissions," according to Lockheed's filing. "The inescapable conclusion is that the very apex of Boeing's management structure was privy to and willing to exploit the bribery scheme between Boeing and Druyun in connection with the EELV competition."

Druyun was sentenced to nine months in prison last month after admitting she showed favoritism to Chicago-based Boeing for years before accepting a job with the company. Boeing said it hasn't seen any evidence that it received preferential treatment.

Boeing dismissed the allegations, saying Lockheed had misrepresented the documents. "There is absolutely no basis to the claim that Darleen showed favoritism towards Boeing in the EELV competition," said Dan Beck, a Boeing spokesman. "We clearly prevailed over Lockheed in that original competition, both on the merits of our proposal and as the only contractor who met all Air Force requirements."

Bethesda-based Lockheed filed a lawsuit against its rival last year after Boeing acknowledged that several of its employees had Lockheed information, including its pricing for the rocket launch competition. Boeing won the 1998 competition and was awarded 19 rocket launches, with seven allocated to Lockheed.

Boeing filed a countersuit against Lockheed, contending that Lockheed is seeking through the court to discredit Boeing and gain a competitive advantage in the rocket launch market.

Lockheed also said in the filing that it wants to depose Boeing officials about Druyun's involvement in the rocket launch competition. Boeing has opposed the motion.

Boeing's space business was suspended last year from competing for contracts. Pentagon officials have said Druyun's recent admissions have made it difficult to determine when the suspension could be lifted.

Lockheed says Darleen A. Druyun discussed its pricing proposal with Boeing.