US3511707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning a stone surface and composition therefor
Assignee: North American Detergent Corp
•
Filing: 1967-05-08
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Granted: 1970-05-12
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Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Paul E La Flamme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:00
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/06; C11D1/00; C11D1/02; C11D1/12; C11D1/30; C11D1/66; C11D2111/00; C11D2111/10; C11D2111/14; C11D2111/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB469333A
Cited
US2826552A
Cited
US2741051A
Cited
US2971918A
Cited
US2987426A
Cited
US2992187A
Cited
US3281341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |