US2480478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic rubber compositions
Assignee: Pierce Lab Inc
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Filing: 1943-09-22
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Granted: 1949-08-30
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Expires: 1963-09-22
Abstract
No abstract record available.
Inventors
- 👤 Nicholas L Kalman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:30
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L93/00; C08L93/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |