Patent US2597802A successfully refreshed from Google Patents.
Patent US2903104A successfully refreshed from Google Patents.
US2903104A
Expired / Lapsed
US
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T joint
Assignee: DONN PRODUCTS Inc
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Filing: 1956-12-20
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Granted: 1959-09-08
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Expires: 1976-12-20
Abstract
No abstract record available.
Inventors
- 👤 Donald A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:10
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/12; E04B9/122; Y; Y10; Y10T; Y10T403/00; Y10T403/44; Y10T403/447
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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |