Google's acquisition of Motorola Mobility is already starting to lose that new car smell, but a fresh batch of financial details has now emerged, providing deeper insight into how the deal actually went down. According to an SEC filing that Motorola Mobility released yesterday, Google made an initial offer of $30 per share on August 1st, but soon raised that bid to $37 per share on August 9th, after Moto and its advisers asked for $43.50. On that same day, Google again raised its offer to $40 per share, even though Motorola wasn't accepting bids from other firms, for fear that a public auction would jeopardize its sale. This 33 percent increase ultimately added some $3 billion to the pot, bringing the final price tag to $12.5 billion. A Mountain View spokeswoman declined to comment on the negotiations, though its aggressive bidding suggests that the search giant desperately wanted the deal to go through. The documents also reveal that patent-related issues were at the forefront of discussions from the very beginning, when Google's Senior Vice President Andy Rubin met with Motorola Mobility CEO Sanjay Jha to talk about their mutual concerns, way back in July. According to the Wall Street Journal, these talks eventually convinced Jha that his company would be better off under Google's stewardship, amid fears that Moto could get swallowed by the stormy seas of patent litigation -- anxieties that the exec made all too apparent just four days before the merger was announced. You can dig through the full SEC filing at the source link below.