US2846135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope for two-way use
Assignee: Tension Envelope Corp
•
Filing: 1954-09-29
•
Granted: 1958-08-05
•
Expires: 1974-09-29
Abstract
No abstract record available.
Inventors
- 👤 Walter L Hiersteiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:23
CPC Classifications
B; B65; B65D; B65D27/00; B65D27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US837228A
Cited
US911794A
Cited
US1376865A
Cited
US1438122A
Cited
US1595782A
Cited
US1645148A
Cited
US2055716A
Cited
US2317497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |