US2150178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sponge rubber and process of making same
Assignee: Individual
•
Filing: 1936-05-04
•
Granted: 1939-03-14
•
Expires: 1956-05-04
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Maywald
- 👤 Jr Frederick J Maywald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:03
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; C; C08; C08J; C08J5/00; C08J5/04; C08J5/045; C08J9/00; C08J9/0085; C08L; C08L21/00; C08J2321/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-03-13 | 1942-09-12 | 1943-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-13 | 1946-09-12 | 1947-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-13 | 1950-09-12 | 1951-03-14 | $7700.00 | Window Closed / Lapsed |