Patent US2156871A successfully refreshed from Google Patents.
US2156871A
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Rubber product
Assignee: FREDERIC H BARTH
•
Filing: 1936-10-30
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Granted: 1939-05-02
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Expires: 1956-10-30
Abstract
No abstract record available.
Inventors
- 👤 Henry J Rittenhouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:41
CPC Classifications
D; D01; D01H; D01H5/00; D01H5/18; D01H5/70; D01H5/74; D01H5/80; C; C08; C08L; C08L21/00; D01H2700/00; D01H2700/245; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24405; Y10T442/00; Y10T442/30; Y10T442/3854; Y10T442/3911
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) | 1942-05-01 | 1942-10-31 | 1943-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-01 | 1946-10-31 | 1947-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-01 | 1950-10-31 | 1951-05-02 | $7700.00 | Window Closed / Lapsed |