US3508474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint seal,etc.
Assignee: HAMILTON KENT MANUFACTURING COMPANY Inc
•
Filing: 1968-09-12
•
Granted: 1970-04-28
•
Expires: 1988-09-12
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:06
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2156681A
Cited
US3119204A
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US3324775A
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US3323426A
Cited
US3179026A
Cited
US3395627A
Cited
US3396640A
Cited
US3388643A
Cited
US3418898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |