US2677138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mattress, method and machine for making the same
Assignee: Individual
•
Filing: 1950-02-04
•
Granted: 1954-05-04
•
Expires: 1970-02-04
Abstract
No abstract record available.
Inventors
- 👤 Fred J Wolfanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
B; B68; B68G; B68G7/00; B68G7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US549840A
Cited
US595152A
Cited
US1211924A
Cited
US1947216A
Cited
US1947217A
Cited
US2281104A
Cited
US2331142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |