Reissue patents can be used to correct errors such as failure to perfect claims for priority (e.g., failure to properly claim a priority filing date of an earlier filed foreign or U.S. patent application), defects in the drawings or specification, improper inventorship, and claiming more or less than what was proper to claim in the original patent.
There are a lot of ways you can be frugal in your garden and save some money. The potting mix you use in your container gardens should be something you feel comfortable splurging on. In my opinion, the best potting soil for edible container garden is the Happy Frog line of potting soil distributed by FoxFarm.
For maximum lettuce production, it's wise to select a site where the soil drains well, yet retains some moisture. The soil should also be rich in nitrogen and potassium, The best way to accomplish this is to work in plenty of organic matter (compost, rotted manure, or leaf mold) that will loosen and enrich the soil.