Method and System for Multiple Asymmetric Encryption of .zip Files
A patent family: one line of work, grouped by real continuity rather than by a technology label
inferred from titles. In-force patents first, soonest term end first, then patent number. Expired patents follow, in the same order.
| Patent | Title | Holder | Status | Expires | Time remaining | Confidence |
|---|---|---|---|---|---|---|
| US 7,895,434 | Method and System for Multiple Asymmetric Encryption of .zip Files In force · High confidence | Pkware, Inc. | In force | High confidence | ||
| US 8,959,582 | System and Method for Manipulating and Managing Computer Archive Files Term ended · USPTO later recorded non-payment Mar 27, 2023 Term ended Mar 9, 2021 · High confidence | Pkware, Inc. | Term ended USPTO later recorded non-payment Mar 27, 2023 | Term ended Mar 9, 2021 | Term ended Mar 9, 2021 | High confidence |
| US 9,886,444 | Systems and Methods for Manipulating and Managing Computer Archive Files Term ended · USPTO later recorded non-payment Mar 16, 2026 Term ended Mar 9, 2021 · High confidence | Pkware, Inc. | Term ended USPTO later recorded non-payment Mar 16, 2026 | Term ended Mar 9, 2021 | Term ended Mar 9, 2021 | High confidence |
| US 10,229,130 | Systems and Methods for Manipulating and Managing Computer Archive Files Term ended Term ended Mar 9, 2021 · Low confidence | Pkware, Inc. | Term ended | Term ended Mar 9, 2021 | Term ended Mar 9, 2021 | Low confidence |
| US 10,949,394 | Systems and Methods for Manipulating and Managing Computer Archive Files Term ended · USPTO later recorded non-payment Apr 21, 2025 Term ended Mar 9, 2021 · High confidence | Pkware, Inc. | Term ended USPTO later recorded non-payment Apr 21, 2025 | Term ended Mar 9, 2021 | Term ended Mar 9, 2021 | High confidence |
| US 6,879,988 | System and Method for Manipulating and Managing Computer Archive Files Term ended Term ended Dec 4, 2021 · High confidence | Pkware, Inc. | Term ended | Term ended Dec 4, 2021 | Term ended Dec 4, 2021 | High confidence |
| US 8,090,942 | Method and System for Asymmetrically Encrypting .zip Files Term ended · USPTO later recorded non-payment Feb 5, 2024 Ended no later than Dec 10, 2021 · Medium confidence | Pkware, Inc. | Term ended USPTO later recorded non-payment Feb 5, 2024 | Ended no later than Dec 10, 2021 | Ended no later than Dec 10, 2021 | Medium confidence |
| US 7,890,465 | Systems and Methods for Manipulating and Managing Computer Archive Files Term ended · USPTO later recorded non-payment Mar 20, 2023 Term ended Jan 26, 2022 · High confidence | Pkware, Inc. | Term ended USPTO later recorded non-payment Mar 20, 2023 | Term ended Jan 26, 2022 | Term ended Jan 26, 2022 | High confidence |
| US 7,844,579 | System and Method for Manipulating and Managing Computer Archive Files Term ended · USPTO later recorded non-payment Jan 2, 2023 Term ended Feb 21, 2022 · High confidence | Pkware, Inc. | Term ended USPTO later recorded non-payment Jan 2, 2023 | Term ended Feb 21, 2022 | Term ended Feb 21, 2022 | High confidence |
| US 8,230,482 | System and Method for Manipulating and Managing Computer Archive Files Term ended · USPTO later recorded non-payment Aug 26, 2024 Term ended May 6, 2023 · High confidence | Pkware, Inc. | Term ended USPTO later recorded non-payment Aug 26, 2024 | Term ended May 6, 2023 | Term ended May 6, 2023 | High confidence |
| 39 more patents in this group · Pro | ||||||
10 of 49 records shown. In-force patents first, soonest term end first, then patent number. Expired patents follow, in the same order.
Pro members see all 49, including 15 expired and 1 expiring within the 18 months from Nov 15, 2026.
1 of these is in force and held by Pkware, Inc..
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.